./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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/float-benchs/inv_square-1.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f21bd079a72df9571675fc971a9b8a83bd94e3e2 ..................................................................................................................................................................................................................................................................................................................... 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 -Xmx12G -Xms1G -ea -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/float-benchs/inv_square-1.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f21bd079a72df9571675fc971a9b8a83bd94e3e2 .......................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-8bd4bc6 [2020-07-28 17:26:12,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 17:26:12,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 17:26:12,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 17:26:12,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 17:26:12,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 17:26:12,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 17:26:12,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 17:26:12,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 17:26:12,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 17:26:12,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 17:26:12,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 17:26:12,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 17:26:12,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 17:26:12,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 17:26:12,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 17:26:12,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 17:26:12,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 17:26:12,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 17:26:12,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 17:26:12,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 17:26:12,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 17:26:12,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 17:26:12,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 17:26:12,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 17:26:12,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 17:26:12,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 17:26:12,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 17:26:12,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 17:26:12,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 17:26:12,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 17:26:12,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 17:26:12,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 17:26:12,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 17:26:12,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 17:26:12,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 17:26:12,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 17:26:12,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 17:26:12,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 17:26:12,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 17:26:12,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 17:26:12,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 17:26:12,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 17:26:12,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 17:26:12,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 17:26:12,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 17:26:12,927 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 17:26:12,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 17:26:12,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 17:26:12,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 17:26:12,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 17:26:12,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 17:26:12,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 17:26:12,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 17:26:12,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 17:26:12,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 17:26:12,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 17:26:12,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 17:26:12,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 17:26:12,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 17:26:12,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 17:26:12,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 17:26:12,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 17:26:12,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 17:26:12,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 17:26:12,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 17:26:12,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 17:26:12,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 17:26:12,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 17:26:12,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 17:26:12,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 17:26:12,934 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(__VERIFIER_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 -> f21bd079a72df9571675fc971a9b8a83bd94e3e2 [2020-07-28 17:26:13,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 17:26:13,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 17:26:13,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 17:26:13,315 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 17:26:13,318 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 17:26:13,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-07-28 17:26:13,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9dfc4f6d/eaffd6bf479b4b94acfe4f7db75bde39/FLAGe8638e971 [2020-07-28 17:26:13,865 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 17:26:13,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-07-28 17:26:13,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9dfc4f6d/eaffd6bf479b4b94acfe4f7db75bde39/FLAGe8638e971 [2020-07-28 17:26:14,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9dfc4f6d/eaffd6bf479b4b94acfe4f7db75bde39 [2020-07-28 17:26:14,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 17:26:14,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 17:26:14,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 17:26:14,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 17:26:14,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 17:26:14,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a19be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14, skipping insertion in model container [2020-07-28 17:26:14,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 17:26:14,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 17:26:14,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:26:14,510 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 17:26:14,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:26:14,552 INFO L208 MainTranslator]: Completed translation [2020-07-28 17:26:14,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14 WrapperNode [2020-07-28 17:26:14,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 17:26:14,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 17:26:14,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 17:26:14,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 17:26:14,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 17:26:14,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 17:26:14,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 17:26:14,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 17:26:14,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (1/1) ... [2020-07-28 17:26:14,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 17:26:14,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 17:26:14,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 17:26:14,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 17:26:14,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (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 [2020-07-28 17:26:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 17:26:14,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 17:26:14,993 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 17:26:14,994 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-07-28 17:26:15,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:15 BoogieIcfgContainer [2020-07-28 17:26:15,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 17:26:15,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 17:26:15,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 17:26:15,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 17:26:15,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 05:26:14" (1/3) ... [2020-07-28 17:26:15,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d77acab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:26:15, skipping insertion in model container [2020-07-28 17:26:15,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:14" (2/3) ... [2020-07-28 17:26:15,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d77acab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:26:15, skipping insertion in model container [2020-07-28 17:26:15,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:15" (3/3) ... [2020-07-28 17:26:15,031 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-07-28 17:26:15,046 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 17:26:15,054 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 17:26:15,092 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 17:26:15,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 17:26:15,123 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 17:26:15,124 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 17:26:15,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 17:26:15,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 17:26:15,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 17:26:15,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 17:26:15,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 17:26:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-07-28 17:26:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 17:26:15,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:26:15,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 17:26:15,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:26:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:26:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash 29681864, now seen corresponding path program 1 times [2020-07-28 17:26:15,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:26:15,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218570750] [2020-07-28 17:26:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:26:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:26:15,308 INFO L280 TraceCheckUtils]: 0: Hoare triple {14#true} havoc main_#res;havoc main_#t~nondet0, main_~x~0, main_~y~0, main_~z~0;havoc main_~x~0;havoc main_~y~0;havoc main_~z~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;assume_abort_if_not_#in~cond := (if ~someBinaryFLOATComparisonOperation(main_~x~0, ~someUnaryFLOAToperation(1.0)) && ~someBinaryFLOATComparisonOperation(main_~x~0, 1.0) then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; {14#true} is VALID [2020-07-28 17:26:15,311 INFO L280 TraceCheckUtils]: 1: Hoare triple {14#true} assume 0 == assume_abort_if_not_~cond;assume false; {15#false} is VALID [2020-07-28 17:26:15,311 INFO L280 TraceCheckUtils]: 2: Hoare triple {15#false} assume ~someBinaryFLOATComparisonOperation(main_~x~0, 0.0);main_~y~0 := ~someBinaryArithmeticFLOAToperation(main_~x~0, main_~x~0);__VERIFIER_assert_#in~cond := (if ~someBinaryFLOATComparisonOperation(main_~y~0, 0.0) then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {15#false} is VALID [2020-07-28 17:26:15,312 INFO L280 TraceCheckUtils]: 3: Hoare triple {15#false} assume 0 == __VERIFIER_assert_~cond; {15#false} is VALID [2020-07-28 17:26:15,312 INFO L280 TraceCheckUtils]: 4: Hoare triple {15#false} assume !false; {15#false} is VALID [2020-07-28 17:26:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:26:15,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218570750] [2020-07-28 17:26:15,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 17:26:15,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-28 17:26:15,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78284619] [2020-07-28 17:26:15,326 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-07-28 17:26:15,329 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 17:26:15,333 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-28 17:26:15,379 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 5 edges. 5 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:26:15,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-28 17:26:15,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 17:26:15,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-28 17:26:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 17:26:15,390 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-07-28 17:26:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:15,424 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-28 17:26:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-28 17:26:15,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-07-28 17:26:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 17:26:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:26:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 23 transitions. [2020-07-28 17:26:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:26:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 23 transitions. [2020-07-28 17:26:15,435 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 23 transitions. [2020-07-28 17:26:15,485 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:26:15,496 INFO L225 Difference]: With dead ends: 20 [2020-07-28 17:26:15,497 INFO L226 Difference]: Without dead ends: 6 [2020-07-28 17:26:15,500 INFO L675 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 [2020-07-28 17:26:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-07-28 17:26:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-07-28 17:26:15,523 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 17:26:15,526 INFO L82 GeneralOperation]: Start isEquivalent. First operand 6 states. Second operand 6 states. [2020-07-28 17:26:15,528 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2020-07-28 17:26:15,528 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2020-07-28 17:26:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:15,531 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-07-28 17:26:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-07-28 17:26:15,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:26:15,533 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:26:15,533 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 6 states. [2020-07-28 17:26:15,533 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 6 states. [2020-07-28 17:26:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:15,535 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-07-28 17:26:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-07-28 17:26:15,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:26:15,536 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:26:15,536 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 17:26:15,536 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 17:26:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-28 17:26:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2020-07-28 17:26:15,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 5 [2020-07-28 17:26:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 17:26:15,545 INFO L479 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2020-07-28 17:26:15,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-28 17:26:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-07-28 17:26:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 17:26:15,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:26:15,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 17:26:15,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 17:26:15,548 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:26:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:26:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash 29741446, now seen corresponding path program 1 times [2020-07-28 17:26:15,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:26:15,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495017397] [2020-07-28 17:26:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:26:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:26:15,577 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:26:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:26:15,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:26:15,629 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 17:26:15,629 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 17:26:15,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 17:26:15,649 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 17:26:15,649 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 17:26:15,649 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 17:26:15,649 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L20-1 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L11-1 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L11-1 has no Hoare annotation [2020-07-28 17:26:15,650 WARN L170 areAnnotationChecker]: L11-3 has no Hoare annotation [2020-07-28 17:26:15,651 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-28 17:26:15,651 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 17:26:15,651 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 17:26:15,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 05:26:15 BoogieIcfgContainer [2020-07-28 17:26:15,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 17:26:15,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 17:26:15,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 17:26:15,655 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 17:26:15,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:15" (3/4) ... [2020-07-28 17:26:15,659 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-07-28 17:26:15,660 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 17:26:15,663 INFO L168 Benchmark]: Toolchain (without parser) took 1407.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.5 MB). Free memory was 960.2 MB in the beginning and 1.0 GB in the end (delta: -44.7 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:15,664 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:15,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.75 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:15,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.5 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -105.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:15,666 INFO L168 Benchmark]: Boogie Preprocessor took 39.55 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:15,667 INFO L168 Benchmark]: RCFGBuilder took 301.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:15,668 INFO L168 Benchmark]: TraceAbstraction took 650.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:15,668 INFO L168 Benchmark]: Witness Printer took 5.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:15,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 295.75 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 103.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.5 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -105.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.55 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 301.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 650.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] float x, y, z; [L17] x = __VERIFIER_nondet_float() [L9] COND FALSE !(!cond) [L20] COND TRUE x != 0.f [L21] y = x * x [L11] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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=11occurred 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, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 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 0.1.25-8bd4bc6 [2020-07-28 17:26:17,804 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-28 17:26:17,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 17:26:17,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 17:26:17,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 17:26:17,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 17:26:17,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 17:26:17,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 17:26:17,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 17:26:17,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 17:26:17,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 17:26:17,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 17:26:17,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 17:26:17,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-07-28 17:26:17,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 17:26:17,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 17:26:17,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 17:26:17,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 17:26:17,893 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 17:26:17,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 17:26:17,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 17:26:17,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 17:26:17,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 17:26:17,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 17:26:17,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 17:26:17,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 17:26:17,896 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-07-28 17:26:17,897 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-07-28 17:26:17,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 17:26:17,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 17:26:17,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 17:26:17,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 17:26:17,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 17:26:17,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 17:26:17,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 17:26:17,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 17:26:17,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 17:26:17,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 17:26:17,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 17:26:17,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 17:26:17,900 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-07-28 17:26:17,901 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-07-28 17:26:17,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 17:26:17,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 17:26:17,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-28 17:26:17,902 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(__VERIFIER_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 -> f21bd079a72df9571675fc971a9b8a83bd94e3e2 [2020-07-28 17:26:18,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 17:26:18,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 17:26:18,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 17:26:18,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 17:26:18,235 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 17:26:18,236 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-07-28 17:26:18,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef5dfaa/5e8b50042cd54ab58c9f59f6ab5bd180/FLAG881b17f7e [2020-07-28 17:26:18,771 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 17:26:18,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-07-28 17:26:18,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef5dfaa/5e8b50042cd54ab58c9f59f6ab5bd180/FLAG881b17f7e [2020-07-28 17:26:19,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baef5dfaa/5e8b50042cd54ab58c9f59f6ab5bd180 [2020-07-28 17:26:19,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 17:26:19,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 17:26:19,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 17:26:19,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 17:26:19,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 17:26:19,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ac9ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19, skipping insertion in model container [2020-07-28 17:26:19,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 17:26:19,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 17:26:19,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:26:19,389 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 17:26:19,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:26:19,434 INFO L208 MainTranslator]: Completed translation [2020-07-28 17:26:19,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19 WrapperNode [2020-07-28 17:26:19,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 17:26:19,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 17:26:19,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 17:26:19,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 17:26:19,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 17:26:19,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 17:26:19,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 17:26:19,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 17:26:19,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (1/1) ... [2020-07-28 17:26:19,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 17:26:19,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 17:26:19,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 17:26:19,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 17:26:19,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (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 [2020-07-28 17:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 17:26:19,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 17:26:20,470 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 17:26:20,470 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-07-28 17:26:20,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:20 BoogieIcfgContainer [2020-07-28 17:26:20,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 17:26:20,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 17:26:20,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 17:26:20,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 17:26:20,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 05:26:19" (1/3) ... [2020-07-28 17:26:20,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbba89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:26:20, skipping insertion in model container [2020-07-28 17:26:20,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:26:19" (2/3) ... [2020-07-28 17:26:20,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbba89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:26:20, skipping insertion in model container [2020-07-28 17:26:20,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:20" (3/3) ... [2020-07-28 17:26:20,482 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-07-28 17:26:20,493 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 17:26:20,501 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 17:26:20,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 17:26:20,540 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 17:26:20,540 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 17:26:20,540 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 17:26:20,541 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 17:26:20,541 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 17:26:20,541 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 17:26:20,542 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 17:26:20,542 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 17:26:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-07-28 17:26:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-28 17:26:20,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:26:20,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-28 17:26:20,564 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:26:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:26:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-07-28 17:26:20,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-07-28 17:26:20,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537397125] [2020-07-28 17:26:20,587 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 [2020-07-28 17:26:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:26:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-28 17:26:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:26:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-28 17:26:20,742 INFO L280 TraceCheckUtils]: 0: Hoare triple {15#true} currentRoundingMode := ~roundNearestTiesToEven; {15#true} is VALID [2020-07-28 17:26:20,743 INFO L280 TraceCheckUtils]: 1: Hoare triple {15#true} havoc main_#res;havoc main_#t~nondet0, main_~x~0, main_~y~0, main_~z~0;havoc main_~x~0;havoc main_~y~0;havoc main_~z~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;assume_abort_if_not_#in~cond := (if ~fp.geq~FLOAT(main_~x~0, ~fp.neg~FLOAT(~to_fp~FLOAT(currentRoundingMode, 1.0))) && ~fp.leq~FLOAT(main_~x~0, ~to_fp~FLOAT(currentRoundingMode, 1.0)) then 1bv32 else 0bv32);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; {15#true} is VALID [2020-07-28 17:26:20,753 INFO L280 TraceCheckUtils]: 2: Hoare triple {15#true} assume 0bv32 == assume_abort_if_not_~cond;assume false; {16#false} is VALID [2020-07-28 17:26:20,754 INFO L280 TraceCheckUtils]: 3: Hoare triple {16#false} assume !~fp.eq~FLOAT(main_~x~0, ~Pluszero~FLOAT());main_~y~0 := ~fp.mul~FLOAT(currentRoundingMode, main_~x~0, main_~x~0);__VERIFIER_assert_#in~cond := (if !~fp.eq~FLOAT(main_~y~0, ~Pluszero~FLOAT()) then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {16#false} is VALID [2020-07-28 17:26:20,754 INFO L280 TraceCheckUtils]: 4: Hoare triple {16#false} assume 0bv32 == __VERIFIER_assert_~cond; {16#false} is VALID [2020-07-28 17:26:20,755 INFO L280 TraceCheckUtils]: 5: Hoare triple {16#false} assume !false; {16#false} is VALID [2020-07-28 17:26:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:26:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-28 17:26:20,774 INFO L280 TraceCheckUtils]: 5: Hoare triple {16#false} assume !false; {16#false} is VALID [2020-07-28 17:26:20,774 INFO L280 TraceCheckUtils]: 4: Hoare triple {16#false} assume 0bv32 == __VERIFIER_assert_~cond; {16#false} is VALID [2020-07-28 17:26:20,774 INFO L280 TraceCheckUtils]: 3: Hoare triple {16#false} assume !~fp.eq~FLOAT(main_~x~0, ~Pluszero~FLOAT());main_~y~0 := ~fp.mul~FLOAT(currentRoundingMode, main_~x~0, main_~x~0);__VERIFIER_assert_#in~cond := (if !~fp.eq~FLOAT(main_~y~0, ~Pluszero~FLOAT()) then 1bv32 else 0bv32);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {16#false} is VALID [2020-07-28 17:26:20,775 INFO L280 TraceCheckUtils]: 2: Hoare triple {15#true} assume 0bv32 == assume_abort_if_not_~cond;assume false; {16#false} is VALID [2020-07-28 17:26:20,776 INFO L280 TraceCheckUtils]: 1: Hoare triple {15#true} havoc main_#res;havoc main_#t~nondet0, main_~x~0, main_~y~0, main_~z~0;havoc main_~x~0;havoc main_~y~0;havoc main_~z~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;assume_abort_if_not_#in~cond := (if ~fp.geq~FLOAT(main_~x~0, ~fp.neg~FLOAT(~to_fp~FLOAT(currentRoundingMode, 1.0))) && ~fp.leq~FLOAT(main_~x~0, ~to_fp~FLOAT(currentRoundingMode, 1.0)) then 1bv32 else 0bv32);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; {15#true} is VALID [2020-07-28 17:26:20,776 INFO L280 TraceCheckUtils]: 0: Hoare triple {15#true} currentRoundingMode := ~roundNearestTiesToEven; {15#true} is VALID [2020-07-28 17:26:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:26:20,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537397125] [2020-07-28 17:26:20,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-07-28 17:26:20,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-07-28 17:26:20,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049728919] [2020-07-28 17:26:20,787 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-28 17:26:20,789 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 17:26:20,793 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-28 17:26:20,849 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:26:20,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-28 17:26:20,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-07-28 17:26:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-28 17:26:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 17:26:20,861 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-07-28 17:26:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:22,053 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-07-28 17:26:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-28 17:26:22,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-28 17:26:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 17:26:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:26:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 24 transitions. [2020-07-28 17:26:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 17:26:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 24 transitions. [2020-07-28 17:26:22,065 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 24 transitions. [2020-07-28 17:26:22,432 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:26:22,444 INFO L225 Difference]: With dead ends: 21 [2020-07-28 17:26:22,445 INFO L226 Difference]: Without dead ends: 7 [2020-07-28 17:26:22,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 17:26:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-07-28 17:26:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-07-28 17:26:22,478 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 17:26:22,478 INFO L82 GeneralOperation]: Start isEquivalent. First operand 7 states. Second operand 7 states. [2020-07-28 17:26:22,479 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2020-07-28 17:26:22,479 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2020-07-28 17:26:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:22,481 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-07-28 17:26:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-07-28 17:26:22,482 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:26:22,482 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:26:22,483 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 7 states. [2020-07-28 17:26:22,483 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 7 states. [2020-07-28 17:26:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:26:22,484 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-07-28 17:26:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-07-28 17:26:22,485 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:26:22,485 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:26:22,485 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 17:26:22,486 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 17:26:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-28 17:26:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-07-28 17:26:22,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-07-28 17:26:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 17:26:22,489 INFO L479 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-07-28 17:26:22,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-28 17:26:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-07-28 17:26:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-28 17:26:22,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:26:22,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-28 17:26:22,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-07-28 17:26:22,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:26:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:26:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-07-28 17:26:22,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-07-28 17:26:22,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120803503] [2020-07-28 17:26:22,704 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 [2020-07-28 17:26:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:26:22,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:26:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:26:22,838 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:26:22,857 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-07-28 17:26:22,857 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 17:26:23,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:26:23,079 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:26:23,080 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2020-07-28 17:26:23,080 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2020-07-28 17:26:23,080 WARN L170 areAnnotationChecker]: L20-1 has no Hoare annotation [2020-07-28 17:26:23,080 WARN L170 areAnnotationChecker]: L11-1 has no Hoare annotation [2020-07-28 17:26:23,080 WARN L170 areAnnotationChecker]: L11-1 has no Hoare annotation [2020-07-28 17:26:23,081 WARN L170 areAnnotationChecker]: L11-3 has no Hoare annotation [2020-07-28 17:26:23,081 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-28 17:26:23,081 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 17:26:23,081 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 17:26:23,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 05:26:23 BoogieIcfgContainer [2020-07-28 17:26:23,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 17:26:23,084 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 17:26:23,084 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 17:26:23,085 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 17:26:23,085 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:26:20" (3/4) ... [2020-07-28 17:26:23,088 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 17:26:23,132 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 17:26:23,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 17:26:23,135 INFO L168 Benchmark]: Toolchain (without parser) took 4005.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 954.8 MB in the beginning and 1.1 GB in the end (delta: -115.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:23,136 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:23,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.20 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:23,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -188.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:23,138 INFO L168 Benchmark]: Boogie Preprocessor took 56.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:23,139 INFO L168 Benchmark]: RCFGBuilder took 872.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:23,140 INFO L168 Benchmark]: TraceAbstraction took 2608.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. [2020-07-28 17:26:23,140 INFO L168 Benchmark]: Witness Printer took 47.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:26:23,144 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 303.20 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 107.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -188.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 872.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2608.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. * Witness Printer took 47.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] float x, y, z; [L17] x = __VERIFIER_nondet_float() [L9] COND FALSE !(!cond) [L20] COND TRUE x != 0.f [L21] y = x * x [L11] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 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...