./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/floats-cdfpl/square_2.i -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 e4a477de7e338b2b004255d636f7482e0c252b22 ....................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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_1.3.100.v20150511-1540.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/floats-cdfpl/square_2.i -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 e4a477de7e338b2b004255d636f7482e0c252b22 ................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:14:16,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:14:16,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:14:16,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:14:16,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:14:16,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:14:16,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:14:16,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:14:16,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:14:16,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:14:16,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:14:16,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:14:16,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:14:16,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:14:16,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:14:16,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:14:16,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:14:16,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:14:16,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:14:16,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:14:16,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:14:16,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:14:16,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:14:16,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:14:16,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:14:17,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:14:17,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:14:17,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:14:17,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:14:17,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:14:17,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:14:17,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:14:17,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:14:17,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:14:17,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:14:17,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:14:17,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:14:17,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:14:17,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:14:17,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:14:17,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:14:17,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:14:17,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:14:17,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:14:17,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:14:17,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:14:17,064 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:14:17,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:14:17,065 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:14:17,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:14:17,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:14:17,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:14:17,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:14:17,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:14:17,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:14:17,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:14:17,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:14:17,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:14:17,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:14:17,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:14:17,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:14:17,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:14:17,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:14:17,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:14:17,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:14:17,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:14:17,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:14:17,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:14:17,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:14:17,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:14:17,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:14:17,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-20 00:14:17,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:14:17,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:14:17,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:14:17,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:14:17,333 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:14:17,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-20 00:14:17,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4f69c3/4fc9b6b88a4847bab29d375c210a0291/FLAG719072246 [2020-10-20 00:14:17,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:14:17,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-20 00:14:17,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4f69c3/4fc9b6b88a4847bab29d375c210a0291/FLAG719072246 [2020-10-20 00:14:18,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4f69c3/4fc9b6b88a4847bab29d375c210a0291 [2020-10-20 00:14:18,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:14:18,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:14:18,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:14:18,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:14:18,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:14:18,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5308761b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18, skipping insertion in model container [2020-10-20 00:14:18,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:14:18,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:14:18,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:14:18,510 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:14:18,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:14:18,546 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:14:18,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18 WrapperNode [2020-10-20 00:14:18,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:14:18,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:14:18,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:14:18,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:14:18,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:14:18,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:14:18,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:14:18,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:14:18,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... [2020-10-20 00:14:18,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:14:18,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:14:18,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:14:18,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:14:18,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:14:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:14:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:14:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:14:18,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:14:18,870 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:14:18,871 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 00:14:18,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:18 BoogieIcfgContainer [2020-10-20 00:14:18,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:14:18,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:14:18,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:14:18,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:14:18,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:14:18" (1/3) ... [2020-10-20 00:14:18,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143bd0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:14:18, skipping insertion in model container [2020-10-20 00:14:18,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:18" (2/3) ... [2020-10-20 00:14:18,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143bd0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:14:18, skipping insertion in model container [2020-10-20 00:14:18,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:18" (3/3) ... [2020-10-20 00:14:18,883 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-20 00:14:18,895 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:14:18,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:14:18,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:14:18,951 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:14:18,951 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:14:18,952 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:14:18,952 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:14:18,952 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:14:18,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:14:18,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:14:18,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:14:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:14:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:14:18,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:14:18,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:14:18,987 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:14:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:14:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-20 00:14:19,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:14:19,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110096946] [2020-10-20 00:14:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:14:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:14:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:14:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110096946] [2020-10-20 00:14:19,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:14:19,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:14:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269618805] [2020-10-20 00:14:19,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:14:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:14:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:14:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:14:19,180 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:14:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:14:19,196 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-20 00:14:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:14:19,197 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-20 00:14:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:14:19,208 INFO L225 Difference]: With dead ends: 21 [2020-10-20 00:14:19,208 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:14:19,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:14:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:14:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:14:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:14:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-20 00:14:19,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-20 00:14:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:14:19,241 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-20 00:14:19,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:14:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-20 00:14:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:14:19,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:14:19,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:14:19,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:14:19,243 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:14:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:14:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-20 00:14:19,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:14:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984167658] [2020-10-20 00:14:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:14:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:14:19,263 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:14:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:14:19,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:14:19,304 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:14:19,304 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:14:19,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:14:19,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:14:19 BoogieIcfgContainer [2020-10-20 00:14:19,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:14:19,330 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:14:19,330 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:14:19,330 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:14:19,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:18" (3/4) ... [2020-10-20 00:14:19,335 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:14:19,336 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:14:19,338 INFO L168 Benchmark]: Toolchain (without parser) took 1082.84 ms. Allocated memory was 40.9 MB in the beginning and 43.5 MB in the end (delta: 2.6 MB). Free memory was 19.1 MB in the beginning and 14.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,339 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.80 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 19.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.51 ms. Allocated memory is still 41.4 MB. Free memory was 19.4 MB in the beginning and 17.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,342 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 41.4 MB. Free memory was 17.8 MB in the beginning and 16.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,343 INFO L168 Benchmark]: RCFGBuilder took 265.27 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 16.5 MB in the beginning and 21.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,344 INFO L168 Benchmark]: TraceAbstraction took 454.69 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 21.0 MB in the beginning and 14.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,345 INFO L168 Benchmark]: Witness Printer took 6.02 ms. Allocated memory is still 43.5 MB. Free memory was 14.7 MB in the beginning and 14.2 MB in the end (delta: 502.2 kB). Peak memory consumption was 502.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:14:19,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 286.80 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 19.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.51 ms. Allocated memory is still 41.4 MB. Free memory was 19.4 MB in the beginning and 17.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 41.4 MB. Free memory was 17.8 MB in the beginning and 16.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 265.27 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 16.5 MB in the beginning and 21.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 454.69 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 21.0 MB in the beginning and 14.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. * Witness Printer took 6.02 ms. Allocated memory is still 43.5 MB. Free memory was 14.7 MB in the beginning and 14.2 MB in the end (delta: 502.2 kB). Peak memory consumption was 502.2 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:14:21,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:14:21,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:14:21,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:14:21,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:14:21,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:14:21,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:14:21,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:14:21,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:14:21,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:14:21,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:14:21,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:14:21,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:14:21,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:14:21,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:14:21,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:14:21,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:14:21,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:14:21,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:14:21,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:14:21,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:14:21,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:14:21,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:14:21,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:14:21,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:14:21,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:14:21,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:14:21,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:14:21,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:14:21,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:14:21,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:14:21,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:14:21,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:14:21,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:14:21,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:14:21,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:14:21,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:14:21,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:14:21,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:14:21,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:14:21,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:14:21,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:14:21,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:14:21,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:14:21,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:14:21,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:14:21,727 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:14:21,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:14:21,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:14:21,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:14:21,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:14:21,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:14:21,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:14:21,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:14:21,729 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:14:21,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:14:21,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:14:21,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:14:21,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:14:21,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:14:21,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:14:21,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:14:21,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:14:21,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:14:21,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:14:21,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:14:21,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:14:21,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:14:21,733 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:14:21,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:14:21,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:14:21,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:14:21,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:14:21,734 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-20 00:14:21,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:14:21,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:14:21,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:14:21,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:14:21,961 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:14:21,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-20 00:14:22,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd791a077/15910a21682e4f38a4b7d9f93c491c89/FLAG92bc08928 [2020-10-20 00:14:22,441 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:14:22,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-20 00:14:22,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd791a077/15910a21682e4f38a4b7d9f93c491c89/FLAG92bc08928 [2020-10-20 00:14:22,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd791a077/15910a21682e4f38a4b7d9f93c491c89 [2020-10-20 00:14:22,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:14:22,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:14:22,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:14:22,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:14:22,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:14:22,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:14:22" (1/1) ... [2020-10-20 00:14:22,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b735c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:22, skipping insertion in model container [2020-10-20 00:14:22,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:14:22" (1/1) ... [2020-10-20 00:14:22,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:14:22,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:14:23,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:14:23,080 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:14:23,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:14:23,121 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:14:23,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23 WrapperNode [2020-10-20 00:14:23,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:14:23,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:14:23,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:14:23,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:14:23,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:14:23,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:14:23,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:14:23,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:14:23,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... [2020-10-20 00:14:23,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:14:23,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:14:23,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:14:23,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:14:23,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:14:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:14:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:14:25,584 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:14:25,584 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 00:14:25,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:25 BoogieIcfgContainer [2020-10-20 00:14:25,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:14:25,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:14:25,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:14:25,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:14:25,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:14:22" (1/3) ... [2020-10-20 00:14:25,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929fc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:14:25, skipping insertion in model container [2020-10-20 00:14:25,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:14:23" (2/3) ... [2020-10-20 00:14:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929fc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:14:25, skipping insertion in model container [2020-10-20 00:14:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:25" (3/3) ... [2020-10-20 00:14:25,596 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-20 00:14:25,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:14:25,614 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:14:25,628 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:14:25,647 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:14:25,648 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:14:25,648 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:14:25,648 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:14:25,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:14:25,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:14:25,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:14:25,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:14:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:14:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:14:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:14:25,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:14:25,672 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:14:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:14:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-20 00:14:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:14:25,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855920642] [2020-10-20 00:14:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:14:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:14:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:14:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:14:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:14:26,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:14:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:14:26,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855920642] [2020-10-20 00:14:26,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:14:26,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:14:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845018542] [2020-10-20 00:14:26,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:14:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:14:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:14:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:14:26,240 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:14:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:14:26,254 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-20 00:14:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:14:26,255 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-20 00:14:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:14:26,264 INFO L225 Difference]: With dead ends: 21 [2020-10-20 00:14:26,264 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:14:26,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:14:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:14:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:14:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:14:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-20 00:14:26,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-20 00:14:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:14:26,295 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-20 00:14:26,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:14:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-20 00:14:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:14:26,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:14:26,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:14:26,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:14:26,503 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:14:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:14:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-20 00:14:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:14:26,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989469486] [2020-10-20 00:14:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:15:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:15:13,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:15:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:15:40,448 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:15:40,524 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:15:40,524 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:15:40,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:15:40,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:15:40 BoogieIcfgContainer [2020-10-20 00:15:40,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:15:40,758 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:15:40,758 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:15:40,758 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:15:40,763 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:14:25" (3/4) ... [2020-10-20 00:15:40,768 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:15:40,819 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:15:40,819 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:15:40,821 INFO L168 Benchmark]: Toolchain (without parser) took 78040.34 ms. Allocated memory was 36.2 MB in the beginning and 46.7 MB in the end (delta: 10.5 MB). Free memory was 17.1 MB in the beginning and 26.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,822 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 10.1 MB in the beginning and 10.0 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.94 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 16.1 MB in the beginning and 25.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.30 ms. Allocated memory is still 44.6 MB. Free memory was 25.4 MB in the beginning and 23.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,825 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 ms. Allocated memory is still 44.6 MB. Free memory was 23.6 MB in the beginning and 22.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,826 INFO L168 Benchmark]: RCFGBuilder took 2390.75 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 22.1 MB in the beginning and 22.8 MB in the end (delta: -694.6 kB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,827 INFO L168 Benchmark]: TraceAbstraction took 75169.38 ms. Allocated memory is still 46.7 MB. Free memory was 22.3 MB in the beginning and 28.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,827 INFO L168 Benchmark]: Witness Printer took 61.48 ms. Allocated memory is still 46.7 MB. Free memory was 28.1 MB in the beginning and 26.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:15:40,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 10.1 MB in the beginning and 10.0 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 335.94 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 16.1 MB in the beginning and 25.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 42.30 ms. Allocated memory is still 44.6 MB. Free memory was 25.4 MB in the beginning and 23.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.03 ms. Allocated memory is still 44.6 MB. Free memory was 23.6 MB in the beginning and 22.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 2390.75 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 22.1 MB in the beginning and 22.8 MB in the end (delta: -694.6 kB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 75169.38 ms. Allocated memory is still 46.7 MB. Free memory was 22.3 MB in the beginning and 28.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * Witness Printer took 61.48 ms. Allocated memory is still 46.7 MB. Free memory was 28.1 MB in the beginning and 26.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 75.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 47.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be incorrect! Received shutdown request...