./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.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 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:06:21,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:06:21,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:06:21,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:06:21,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:06:21,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:06:21,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:06:21,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:06:21,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:06:21,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:06:21,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:06:21,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:06:21,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:06:21,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:06:21,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:06:21,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:06:21,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:06:21,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:06:21,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:06:21,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:06:21,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:06:21,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:06:21,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:06:21,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:06:21,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:06:21,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:06:21,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:06:21,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:06:21,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:06:21,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:06:21,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:06:21,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:06:21,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:06:22,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:06:22,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:06:22,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:06:22,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:06:22,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:06:22,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:06:22,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:06:22,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:06:22,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:06:22,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:06:22,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:06:22,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:06:22,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:06:22,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:06:22,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:06:22,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:06:22,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:06:22,025 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:06:22,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:06:22,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:06:22,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:06:22,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:06:22,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:06:22,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:06:22,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:06:22,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:06:22,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:06:22,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:06:22,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:06:22,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:06:22,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:06:22,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:06:22,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:06:22,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:06:22,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:06:22,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:06:22,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:06:22,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:06:22,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 [2021-12-22 10:06:22,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:06:22,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:06:22,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:06:22,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:06:22,287 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:06:22,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:22,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05b276717/e27cbc0297bd4098bb77f475793bf137/FLAG131f0cc68 [2021-12-22 10:06:22,664 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:06:22,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:22,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05b276717/e27cbc0297bd4098bb77f475793bf137/FLAG131f0cc68 [2021-12-22 10:06:23,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05b276717/e27cbc0297bd4098bb77f475793bf137 [2021-12-22 10:06:23,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:06:23,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:06:23,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:06:23,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:06:23,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:06:23,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d10464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23, skipping insertion in model container [2021-12-22 10:06:23,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:06:23,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:06:23,265 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2021-12-22 10:06:23,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:06:23,276 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:06:23,293 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2021-12-22 10:06:23,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:06:23,306 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:06:23,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23 WrapperNode [2021-12-22 10:06:23,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:06:23,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:06:23,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:06:23,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:06:23,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,333 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 92 [2021-12-22 10:06:23,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:06:23,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:06:23,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:06:23,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:06:23,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:06:23,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:06:23,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:06:23,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:06:23,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (1/1) ... [2021-12-22 10:06:23,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:06:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:06:23,384 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) [2021-12-22 10:06:23,411 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 [2021-12-22 10:06:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:06:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:06:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:06:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:06:23,489 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:06:23,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:06:23,596 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:06:23,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:06:23,601 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 10:06:23,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:23 BoogieIcfgContainer [2021-12-22 10:06:23,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:06:23,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:06:23,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:06:23,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:06:23,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:06:23" (1/3) ... [2021-12-22 10:06:23,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fca81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:23, skipping insertion in model container [2021-12-22 10:06:23,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:23" (2/3) ... [2021-12-22 10:06:23,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fca81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:23, skipping insertion in model container [2021-12-22 10:06:23,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:23" (3/3) ... [2021-12-22 10:06:23,610 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:23,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:06:23,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:06:23,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:06:23,657 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 [2021-12-22 10:06:23,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:06:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2021-12-22 10:06:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:06:23,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:06:23,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:06:23,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:06:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:06:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2001896247, now seen corresponding path program 1 times [2021-12-22 10:06:23,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:06:23,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399489105] [2021-12-22 10:06:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:06:23,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:06:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:06:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:06:23,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:06:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399489105] [2021-12-22 10:06:23,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399489105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:06:23,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:06:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:06:23,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275403832] [2021-12-22 10:06:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:06:23,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:06:23,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:06:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:06:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:06:23,916 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:06:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:06:23,994 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-12-22 10:06:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:06:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-22 10:06:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:06:24,006 INFO L225 Difference]: With dead ends: 51 [2021-12-22 10:06:24,007 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 10:06:24,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:06:24,014 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:06:24,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:06:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 10:06:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-12-22 10:06:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-12-22 10:06:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-12-22 10:06:24,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-12-22 10:06:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:06:24,057 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-12-22 10:06:24,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:06:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-12-22 10:06:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:06:24,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:06:24,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:06:24,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:06:24,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:06:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:06:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1984885586, now seen corresponding path program 1 times [2021-12-22 10:06:24,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:06:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343562717] [2021-12-22 10:06:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:06:24,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:06:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:06:24,102 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 10:06:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:06:24,150 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 10:06:24,151 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 10:06:24,153 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 10:06:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:06:24,166 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-22 10:06:24,171 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 10:06:24,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:06:24 BoogieIcfgContainer [2021-12-22 10:06:24,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 10:06:24,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 10:06:24,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 10:06:24,224 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 10:06:24,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:23" (3/4) ... [2021-12-22 10:06:24,230 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 10:06:24,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 10:06:24,232 INFO L158 Benchmark]: Toolchain (without parser) took 1128.28ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 74.9MB in the beginning and 107.2MB in the end (delta: -32.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:06:24,232 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 41.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:06:24,235 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.69ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 74.6MB in the beginning and 106.9MB in the end (delta: -32.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 10:06:24,237 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.11ms. Allocated memory is still 132.1MB. Free memory was 106.9MB in the beginning and 105.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:06:24,239 INFO L158 Benchmark]: Boogie Preprocessor took 18.95ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 104.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:06:24,240 INFO L158 Benchmark]: RCFGBuilder took 249.50ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 94.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 10:06:24,240 INFO L158 Benchmark]: TraceAbstraction took 617.34ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 107.8MB in the end (delta: -13.5MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. [2021-12-22 10:06:24,241 INFO L158 Benchmark]: Witness Printer took 7.68ms. Allocated memory is still 132.1MB. Free memory was 107.8MB in the beginning and 107.2MB in the end (delta: 554.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:06:24,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 41.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.69ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 74.6MB in the beginning and 106.9MB in the end (delta: -32.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.11ms. Allocated memory is still 132.1MB. Free memory was 106.9MB in the beginning and 105.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.95ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 104.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 249.50ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 94.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 617.34ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 107.8MB in the end (delta: -13.5MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. * Witness Printer took 7.68ms. Allocated memory is still 132.1MB. Free memory was 107.8MB in the beginning and 107.2MB in the end (delta: 554.1kB). 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: 101]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 88, overapproximation of someBinaryArithmeticDOUBLEoperation at line 85, overapproximation of someUnaryDOUBLEoperation at line 42. Possible FailurePath: [L1] int __return_main; [L11] double _EPS = 0.0000010; [L14] double __return_125; VAL [__return_125=0, __return_main=0, _EPS=1/1000000] [L17] double main__d; [L18] double main__r; [L19] main__d = 1.0 VAL [__return_125=0, __return_main=0, _EPS=1/1000000, main__d=1] [L21] COND TRUE main__d <= 20.0 [L24] double __tmp_1; [L25] __tmp_1 = main__d [L26] double SqrtR__Input; [L27] SqrtR__Input = __tmp_1 [L28] double SqrtR__xn; [L29] double SqrtR__xnp1; [L30] double SqrtR__residu; [L31] double SqrtR__lsup; [L32] double SqrtR__linf; [L33] int SqrtR__i; [L34] int SqrtR__cond; VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR__Input=1] [L35] COND FALSE !(SqrtR__Input <= 1.0) [L139] SqrtR__xn = 1.0 / SqrtR__Input VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR__Input=1] [L39] SqrtR__xnp1 = SqrtR__xn [L40] SqrtR__residu = (2.0 * _EPS) * (SqrtR__xn + SqrtR__xnp1) [L41] SqrtR__lsup = _EPS * (SqrtR__xn + SqrtR__xnp1) [L42] SqrtR__linf = -SqrtR__lsup [L43] int SqrtR____CPAchecker_TMP_0; VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L44] COND FALSE !(SqrtR__residu > SqrtR__lsup) VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L126] COND FALSE !(SqrtR__residu < SqrtR__linf) [L132] SqrtR____CPAchecker_TMP_0 = 0 VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR____CPAchecker_TMP_0=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L49] SqrtR__cond = SqrtR____CPAchecker_TMP_0 [L50] SqrtR__i = 0 VAL [__return_125=0, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L52] COND FALSE !(!(SqrtR__cond == 0)) [L85] __return_125 = 1.0 / SqrtR__xnp1 [L86] main__r = __return_125 [L87] int main____CPAchecker_TMP_0; VAL [__return_125=49, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L88] COND FALSE !(main__r >= 1.0) VAL [__return_125=49, __return_main=0, __tmp_1=1, _EPS=1/1000000, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L114] main____CPAchecker_TMP_0 = 0 VAL [__return_125=49, __return_main=0, __tmp_1=1, _EPS=1/1000000, main____CPAchecker_TMP_0=0, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L95] int __tmp_2; [L96] __tmp_2 = main____CPAchecker_TMP_0 [L97] int __VERIFIER_assert__cond; [L98] __VERIFIER_assert__cond = __tmp_2 VAL [__return_125=49, __return_main=0, __tmp_1=1, __tmp_2=0, __VERIFIER_assert__cond=0, _EPS=1/1000000, main____CPAchecker_TMP_0=0, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L99] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_125=49, __return_main=0, __tmp_1=1, __tmp_2=0, __VERIFIER_assert__cond=0, _EPS=1/1000000, main____CPAchecker_TMP_0=0, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] [L101] reach_error() VAL [__return_125=49, __return_main=0, __tmp_1=1, __tmp_2=0, __VERIFIER_assert__cond=0, _EPS=1/1000000, main____CPAchecker_TMP_0=0, main__d=1, main__r=49, SqrtR____CPAchecker_TMP_0=0, SqrtR__cond=0, SqrtR__i=0, SqrtR__Input=1, SqrtR__xn=50, SqrtR__xnp1=50] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 114 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 58 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15 IncrementalHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 56 mSDtfsCounter, 15 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 17 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 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 [2021-12-22 10:06:24,283 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.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 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:06:26,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:06:26,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:06:26,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:06:26,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:06:26,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:06:26,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:06:26,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:06:26,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:06:26,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:06:26,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:06:26,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:06:26,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:06:26,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:06:26,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:06:26,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:06:26,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:06:26,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:06:26,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:06:26,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:06:26,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:06:26,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:06:26,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:06:26,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:06:26,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:06:26,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:06:26,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:06:26,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:06:26,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:06:26,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:06:26,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:06:26,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:06:26,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:06:26,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:06:26,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:06:26,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:06:26,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:06:26,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:06:26,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:06:26,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:06:26,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:06:26,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-22 10:06:26,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:06:26,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:06:26,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:06:26,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:06:26,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:06:26,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:06:26,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:06:26,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:06:26,140 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:06:26,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:06:26,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:06:26,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 10:06:26,142 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 10:06:26,143 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 10:06:26,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:06:26,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:06:26,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:06:26,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:06:26,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:06:26,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:06:26,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:06:26,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:06:26,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:06:26,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:06:26,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:06:26,145 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 10:06:26,156 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 10:06:26,156 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:06:26,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:06:26,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:06:26,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:06:26,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 10:06:26,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 [2021-12-22 10:06:26,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:06:26,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:06:26,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:06:26,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:06:26,488 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:06:26,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:26,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01069594/ff7f21fd0343494ab6d997d6ef91bc7e/FLAGb8bf1e24f [2021-12-22 10:06:26,967 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:06:26,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:26,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01069594/ff7f21fd0343494ab6d997d6ef91bc7e/FLAGb8bf1e24f [2021-12-22 10:06:26,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01069594/ff7f21fd0343494ab6d997d6ef91bc7e [2021-12-22 10:06:26,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:06:26,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:06:26,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:06:26,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:06:26,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:06:26,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:26" (1/1) ... [2021-12-22 10:06:26,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289dd0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:26, skipping insertion in model container [2021-12-22 10:06:27,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:26" (1/1) ... [2021-12-22 10:06:27,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:06:27,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:06:27,137 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2021-12-22 10:06:27,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:06:27,152 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:06:27,195 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/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2021-12-22 10:06:27,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:06:27,218 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:06:27,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27 WrapperNode [2021-12-22 10:06:27,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:06:27,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:06:27,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:06:27,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:06:27,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,249 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2021-12-22 10:06:27,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:06:27,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:06:27,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:06:27,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:06:27,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:06:27,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:06:27,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:06:27,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:06:27,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (1/1) ... [2021-12-22 10:06:27,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:06:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:06:27,324 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) [2021-12-22 10:06:27,335 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 [2021-12-22 10:06:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:06:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 10:06:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:06:27,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:06:27,432 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:06:27,433 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:06:35,841 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:06:35,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:06:35,847 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 10:06:35,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:35 BoogieIcfgContainer [2021-12-22 10:06:35,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:06:35,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:06:35,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:06:35,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:06:35,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:06:26" (1/3) ... [2021-12-22 10:06:35,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c18da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:35, skipping insertion in model container [2021-12-22 10:06:35,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:27" (2/3) ... [2021-12-22 10:06:35,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c18da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:35, skipping insertion in model container [2021-12-22 10:06:35,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:35" (3/3) ... [2021-12-22 10:06:35,854 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2021-12-22 10:06:35,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:06:35,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:06:35,908 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:06:35,913 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 [2021-12-22 10:06:35,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:06:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2021-12-22 10:06:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:06:35,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:06:35,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:06:35,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:06:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:06:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2001896247, now seen corresponding path program 1 times [2021-12-22 10:06:35,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:06:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792837460] [2021-12-22 10:06:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:06:35,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:06:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:06:35,943 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) [2021-12-22 10:06:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 10:06:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:06:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:06:37,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:06:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:06:38,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:06:38,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:06:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792837460] [2021-12-22 10:06:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792837460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:06:38,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:06:38,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:06:38,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74412084] [2021-12-22 10:06:38,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:06:38,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:06:38,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:06:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:06:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:06:38,128 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:06:40,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:43,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:45,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:48,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:50,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:53,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:55,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:06:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:06:55,809 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2021-12-22 10:06:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:06:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-22 10:06:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:06:55,818 INFO L225 Difference]: With dead ends: 49 [2021-12-22 10:06:55,818 INFO L226 Difference]: Without dead ends: 24 [2021-12-22 10:06:55,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:06:55,823 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:06:55,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 7 Unknown, 0 Unchecked, 17.5s Time] [2021-12-22 10:06:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-22 10:06:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-22 10:06:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-12-22 10:06:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-12-22 10:06:55,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-12-22 10:06:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:06:55,845 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-12-22 10:06:55,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:06:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-12-22 10:06:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:06:55,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:06:55,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:06:55,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 10:06:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:06:56,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:06:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:06:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash 939018830, now seen corresponding path program 1 times [2021-12-22 10:06:56,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:06:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520848144] [2021-12-22 10:06:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:06:56,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:06:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:06:56,054 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) [2021-12-22 10:06:56,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 10:06:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:06:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:06:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:06:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:06:58,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:06:58,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:06:58,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520848144] [2021-12-22 10:06:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520848144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:06:58,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:06:58,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:06:58,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780593628] [2021-12-22 10:06:58,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:06:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:06:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:06:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:06:58,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:06:58,284 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:07:02,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:05,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:08,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:10,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:12,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:07:13,038 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2021-12-22 10:07:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:07:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-22 10:07:13,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:07:13,041 INFO L225 Difference]: With dead ends: 47 [2021-12-22 10:07:13,041 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 10:07:13,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:07:13,042 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:07:13,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 14.4s Time] [2021-12-22 10:07:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 10:07:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-12-22 10:07:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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) [2021-12-22 10:07:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-12-22 10:07:13,047 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2021-12-22 10:07:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:07:13,047 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-12-22 10:07:13,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:07:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-12-22 10:07:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:07:13,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:07:13,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:07:13,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:07:13,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:07:13,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:07:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:07:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1251138159, now seen corresponding path program 1 times [2021-12-22 10:07:13,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:07:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876310656] [2021-12-22 10:07:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:07:13,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:07:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:07:13,254 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) [2021-12-22 10:07:13,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 10:07:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:07:14,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 10:07:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:07:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:07:14,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:07:14,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:07:14,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876310656] [2021-12-22 10:07:14,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876310656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:07:14,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:07:14,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:07:14,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852888834] [2021-12-22 10:07:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:07:14,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:07:14,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:07:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:07:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:07:14,727 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:07:16,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:20,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:22,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:07:22,743 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-12-22 10:07:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:07:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-22 10:07:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:07:22,744 INFO L225 Difference]: With dead ends: 46 [2021-12-22 10:07:22,744 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 10:07:22,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:07:22,745 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-22 10:07:22,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2021-12-22 10:07:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 10:07:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-22 10:07:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 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) [2021-12-22 10:07:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-12-22 10:07:22,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2021-12-22 10:07:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:07:22,750 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-12-22 10:07:22,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-22 10:07:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-12-22 10:07:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 10:07:22,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:07:22,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:07:22,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:07:22,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:07:22,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:07:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:07:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1124243894, now seen corresponding path program 1 times [2021-12-22 10:07:22,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:07:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463925279] [2021-12-22 10:07:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:07:22,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:07:22,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:07:22,953 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) [2021-12-22 10:07:22,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 10:07:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:07:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 10:07:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:07:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:07:28,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:07:28,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:07:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463925279] [2021-12-22 10:07:28,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463925279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:07:28,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:07:28,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:07:28,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134498560] [2021-12-22 10:07:28,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:07:28,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:07:28,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:07:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:07:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:07:28,138 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-22 10:07:30,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:33,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:36,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:38,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:07:41,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []