./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/floats-cbmc-regression/float5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54a68f41 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/floats-cbmc-regression/float5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4353b03ed39dd917d13c7cd6163e83d6972334fc ............................................................................................................................................................................................................................................................................. 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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/floats-cbmc-regression/float5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4353b03ed39dd917d13c7cd6163e83d6972334fc ............................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-54a68f4 [2020-12-03 17:54:26,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 17:54:26,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 17:54:26,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 17:54:26,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 17:54:26,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 17:54:26,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 17:54:26,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 17:54:26,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 17:54:26,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 17:54:26,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 17:54:26,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 17:54:26,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 17:54:26,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 17:54:26,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 17:54:26,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 17:54:26,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 17:54:26,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 17:54:26,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 17:54:26,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 17:54:26,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 17:54:26,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 17:54:26,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 17:54:26,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 17:54:26,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 17:54:26,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 17:54:26,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 17:54:26,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 17:54:26,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 17:54:26,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 17:54:26,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 17:54:26,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 17:54:26,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 17:54:26,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 17:54:26,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 17:54:26,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 17:54:26,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 17:54:26,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 17:54:26,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 17:54:26,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 17:54:26,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 17:54:26,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 17:54:26,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 17:54:26,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 17:54:26,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 17:54:26,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 17:54:26,862 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 17:54:26,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 17:54:26,863 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 17:54:26,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 17:54:26,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 17:54:26,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 17:54:26,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 17:54:26,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 17:54:26,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 17:54:26,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 17:54:26,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 17:54:26,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 17:54:26,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 17:54:26,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 17:54:26,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 17:54:26,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 17:54:26,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 17:54:26,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 17:54:26,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 17:54:26,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 17:54:26,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 17:54:26,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 17:54:26,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 17:54:26,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 17:54:26,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4353b03ed39dd917d13c7cd6163e83d6972334fc [2020-12-03 17:54:27,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 17:54:27,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 17:54:27,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 17:54:27,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 17:54:27,371 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 17:54:27,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cbmc-regression/float5.c [2020-12-03 17:54:27,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b57f4fed/11707ac2d7a547589c852b520c023066/FLAG5b108f178 [2020-12-03 17:54:28,246 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 17:54:28,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c [2020-12-03 17:54:28,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b57f4fed/11707ac2d7a547589c852b520c023066/FLAG5b108f178 [2020-12-03 17:54:28,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b57f4fed/11707ac2d7a547589c852b520c023066 [2020-12-03 17:54:28,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 17:54:28,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 17:54:28,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 17:54:28,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 17:54:28,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 17:54:28,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af70b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28, skipping insertion in model container [2020-12-03 17:54:28,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 17:54:28,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 17:54:28,837 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c[501,514] [2020-12-03 17:54:28,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:54:28,853 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 17:54:28,871 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c[501,514] [2020-12-03 17:54:28,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:54:28,889 INFO L208 MainTranslator]: Completed translation [2020-12-03 17:54:28,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28 WrapperNode [2020-12-03 17:54:28,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 17:54:28,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 17:54:28,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 17:54:28,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 17:54:28,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 17:54:28,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 17:54:28,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 17:54:28,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 17:54:28,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (1/1) ... [2020-12-03 17:54:28,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 17:54:28,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 17:54:28,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 17:54:28,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 17:54:28,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (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 [2020-12-03 17:54:29,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 17:54:29,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 17:54:29,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 17:54:29,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 17:54:29,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 17:54:29,362 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 17:54:29,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:29 BoogieIcfgContainer [2020-12-03 17:54:29,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 17:54:29,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 17:54:29,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 17:54:29,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 17:54:29,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:54:28" (1/3) ... [2020-12-03 17:54:29,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5286a7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:54:29, skipping insertion in model container [2020-12-03 17:54:29,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:28" (2/3) ... [2020-12-03 17:54:29,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5286a7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:54:29, skipping insertion in model container [2020-12-03 17:54:29,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:29" (3/3) ... [2020-12-03 17:54:29,376 INFO L111 eAbstractionObserver]: Analyzing ICFG float5.c [2020-12-03 17:54:29,396 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 17:54:29,401 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 17:54:29,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 17:54:29,457 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 17:54:29,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 17:54:29,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 17:54:29,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 17:54:29,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 17:54:29,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 17:54:29,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 17:54:29,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 17:54:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-03 17:54:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 17:54:29,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:54:29,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 17:54:29,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:54:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:54:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-03 17:54:29,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 17:54:29,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845620947] [2020-12-03 17:54:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 17:54:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:54:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:54:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845620947] [2020-12-03 17:54:29,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:54:29,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 17:54:29,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968554396] [2020-12-03 17:54:29,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 17:54:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 17:54:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 17:54:29,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 17:54:29,807 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 2 states. [2020-12-03 17:54:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:54:29,822 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-03 17:54:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 17:54:29,824 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-03 17:54:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:54:29,833 INFO L225 Difference]: With dead ends: 17 [2020-12-03 17:54:29,833 INFO L226 Difference]: Without dead ends: 7 [2020-12-03 17:54:29,837 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 [2020-12-03 17:54:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-03 17:54:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-03 17:54:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-03 17:54:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-03 17:54:29,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-03 17:54:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:54:29,872 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-03 17:54:29,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 17:54:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-03 17:54:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 17:54:29,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:54:29,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 17:54:29,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 17:54:29,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:54:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:54:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-03 17:54:29,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 17:54:29,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816127023] [2020-12-03 17:54:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 17:54:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 17:54:29,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 17:54:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 17:54:29,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 17:54:29,936 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-03 17:54:29,937 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 17:54:29,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 17:54:29,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:54:29 BoogieIcfgContainer [2020-12-03 17:54:29,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 17:54:29,964 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 17:54:29,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 17:54:29,964 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 17:54:29,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:29" (3/4) ... [2020-12-03 17:54:29,969 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 17:54:29,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 17:54:29,973 INFO L168 Benchmark]: Toolchain (without parser) took 1375.79 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.3 MB in the beginning and 36.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-03 17:54:29,974 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:54:29,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 28.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-03 17:54:29,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:54:29,977 INFO L168 Benchmark]: Boogie Preprocessor took 24.87 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.7 MB in the end (delta: 867.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 17:54:29,978 INFO L168 Benchmark]: RCFGBuilder took 404.05 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.6 MB in the beginning and 39.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-03 17:54:29,979 INFO L168 Benchmark]: TraceAbstraction took 597.02 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 36.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-03 17:54:29,980 INFO L168 Benchmark]: Witness Printer took 5.63 ms. Allocated memory is still 60.8 MB. Free memory was 36.3 MB in the beginning and 36.0 MB in the end (delta: 304.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:54:29,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 28.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.87 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.7 MB in the end (delta: 867.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.05 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.6 MB in the beginning and 39.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 597.02 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 36.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.63 ms. Allocated memory is still 60.8 MB. Free memory was 36.3 MB in the beginning and 36.0 MB in the end (delta: 304.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 10, overapproximation of someBinaryArithmeticFLOAToperation at line 12. Possible FailurePath: [L8] float a=__VERIFIER_nondet_float(), b=__VERIFIER_nondet_float(); [L8] float a=__VERIFIER_nondet_float(), b=__VERIFIER_nondet_float(); [L10] COND FALSE !(!(a==1 || a==0.5 || a==2 || a==3 || a==0.1)) [L11] b=a [L12] a/=2 [L13] a*=2 [L14] COND TRUE !(a==b) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 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=10occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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 0.2.1-54a68f4 [2020-12-03 17:54:32,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 17:54:32,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 17:54:32,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 17:54:32,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 17:54:32,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 17:54:32,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 17:54:32,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 17:54:32,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 17:54:32,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 17:54:32,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 17:54:32,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 17:54:32,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 17:54:32,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 17:54:32,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 17:54:32,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 17:54:32,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 17:54:32,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 17:54:32,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 17:54:32,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 17:54:32,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 17:54:32,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 17:54:32,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 17:54:32,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 17:54:32,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 17:54:32,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 17:54:32,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 17:54:32,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 17:54:32,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 17:54:32,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 17:54:32,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 17:54:32,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 17:54:32,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 17:54:32,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 17:54:32,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 17:54:32,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 17:54:32,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 17:54:32,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 17:54:32,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 17:54:32,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 17:54:32,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 17:54:32,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 17:54:32,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 17:54:32,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 17:54:32,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 17:54:32,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 17:54:32,832 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 17:54:32,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 17:54:32,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 17:54:32,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 17:54:32,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 17:54:32,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 17:54:32,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 17:54:32,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 17:54:32,836 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 17:54:32,836 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 17:54:32,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 17:54:32,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 17:54:32,837 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 17:54:32,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 17:54:32,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 17:54:32,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 17:54:32,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 17:54:32,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 17:54:32,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 17:54:32,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 17:54:32,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 17:54:32,841 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 17:54:32,842 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 17:54:32,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 17:54:32,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 17:54:32,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 17:54:32,843 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4353b03ed39dd917d13c7cd6163e83d6972334fc [2020-12-03 17:54:33,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 17:54:33,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 17:54:33,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 17:54:33,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 17:54:33,362 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 17:54:33,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cbmc-regression/float5.c [2020-12-03 17:54:33,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0bcaaf34/36a365feb3814443922eb0f70bae72bc/FLAG9331562f3 [2020-12-03 17:54:34,072 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 17:54:34,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c [2020-12-03 17:54:34,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0bcaaf34/36a365feb3814443922eb0f70bae72bc/FLAG9331562f3 [2020-12-03 17:54:34,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0bcaaf34/36a365feb3814443922eb0f70bae72bc [2020-12-03 17:54:34,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 17:54:34,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 17:54:34,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 17:54:34,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 17:54:34,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 17:54:34,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6a25e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34, skipping insertion in model container [2020-12-03 17:54:34,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 17:54:34,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 17:54:34,828 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c[501,514] [2020-12-03 17:54:34,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:54:34,852 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 17:54:34,876 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float5.c[501,514] [2020-12-03 17:54:34,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:54:34,899 INFO L208 MainTranslator]: Completed translation [2020-12-03 17:54:34,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34 WrapperNode [2020-12-03 17:54:34,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 17:54:34,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 17:54:34,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 17:54:34,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 17:54:34,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 17:54:34,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 17:54:34,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 17:54:34,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 17:54:34,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (1/1) ... [2020-12-03 17:54:34,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 17:54:34,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 17:54:34,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 17:54:34,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 17:54:34,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (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 [2020-12-03 17:54:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 17:54:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 17:54:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 17:54:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 17:54:36,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 17:54:36,681 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 17:54:36,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:36 BoogieIcfgContainer [2020-12-03 17:54:36,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 17:54:36,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 17:54:36,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 17:54:36,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 17:54:36,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:54:34" (1/3) ... [2020-12-03 17:54:36,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b338511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:54:36, skipping insertion in model container [2020-12-03 17:54:36,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:54:34" (2/3) ... [2020-12-03 17:54:36,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b338511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:54:36, skipping insertion in model container [2020-12-03 17:54:36,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:36" (3/3) ... [2020-12-03 17:54:36,695 INFO L111 eAbstractionObserver]: Analyzing ICFG float5.c [2020-12-03 17:54:36,714 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 17:54:36,718 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 17:54:36,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 17:54:36,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 17:54:36,782 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 17:54:36,782 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 17:54:36,782 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 17:54:36,782 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 17:54:36,783 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 17:54:36,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 17:54:36,783 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 17:54:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-03 17:54:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 17:54:36,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:54:36,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 17:54:36,807 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:54:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:54:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-03 17:54:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:54:36,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557534768] [2020-12-03 17:54:36,829 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 [2020-12-03 17:54:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:54:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 17:54:36,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:54:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:54:37,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:54:37,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557534768] [2020-12-03 17:54:37,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:54:37,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 17:54:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484470426] [2020-12-03 17:54:37,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 17:54:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:54:37,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 17:54:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 17:54:37,039 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 2 states. [2020-12-03 17:54:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:54:37,053 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-03 17:54:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 17:54:37,055 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-03 17:54:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:54:37,063 INFO L225 Difference]: With dead ends: 17 [2020-12-03 17:54:37,064 INFO L226 Difference]: Without dead ends: 7 [2020-12-03 17:54:37,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 17:54:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-03 17:54:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-03 17:54:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-03 17:54:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-03 17:54:37,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-03 17:54:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:54:37,102 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-03 17:54:37,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 17:54:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-03 17:54:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 17:54:37,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:54:37,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 17:54:37,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 17:54:37,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:54:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:54:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-03 17:54:37,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:54:37,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625197148] [2020-12-03 17:54:37,324 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 [2020-12-03 17:54:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:54:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 17:54:37,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:54:39,873 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-12-03 17:55:00,477 WARN L197 SmtUtils]: Spent 16.65 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 17:55:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:55:01,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:55:01,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625197148] [2020-12-03 17:55:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:55:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 17:55:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272672357] [2020-12-03 17:55:01,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 17:55:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:55:01,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 17:55:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 17:55:01,765 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-12-03 17:55:27,655 WARN L197 SmtUtils]: Spent 17.80 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 17:55:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:55:27,656 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-12-03 17:55:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 17:55:27,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-03 17:55:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:55:27,658 INFO L225 Difference]: With dead ends: 7 [2020-12-03 17:55:27,658 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 17:55:27,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2020-12-03 17:55:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 17:55:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 17:55:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 17:55:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 17:55:27,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-12-03 17:55:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:55:27,660 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 17:55:27,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 17:55:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 17:55:27,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 17:55:27,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 17:55:27,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 17:55:27,876 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 17:55:27,876 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-03 17:55:27,876 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 17:55:27,876 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-03 17:55:27,876 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-03 17:55:27,877 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-03 17:55:27,877 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-03 17:55:27,877 INFO L262 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-12-03 17:55:27,877 INFO L262 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2020-12-03 17:55:27,877 INFO L262 CegarLoopResult]: For program point L6(lines 6 15) no Hoare annotation was computed. [2020-12-03 17:55:27,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:55:27 BoogieIcfgContainer [2020-12-03 17:55:27,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 17:55:27,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 17:55:27,883 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 17:55:27,883 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 17:55:27,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:54:36" (3/4) ... [2020-12-03 17:55:27,887 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 17:55:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-03 17:55:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 17:55:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 17:55:27,905 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 17:55:27,941 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 17:55:27,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 17:55:27,944 INFO L168 Benchmark]: Toolchain (without parser) took 53452.39 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 22.0 MB in the beginning and 40.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,945 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 44.0 MB. Free memory is still 29.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:55:27,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.81 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 23.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.68 ms. Allocated memory is still 44.0 MB. Free memory was 23.0 MB in the beginning and 21.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,948 INFO L168 Benchmark]: Boogie Preprocessor took 39.74 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 20.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:55:27,949 INFO L168 Benchmark]: RCFGBuilder took 1687.98 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 20.4 MB in the beginning and 33.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,950 INFO L168 Benchmark]: TraceAbstraction took 51196.20 ms. Allocated memory is still 58.7 MB. Free memory was 33.4 MB in the beginning and 26.2 MB in the end (delta: 7.2 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,951 INFO L168 Benchmark]: Witness Printer took 59.03 ms. Allocated memory is still 58.7 MB. Free memory was 26.2 MB in the beginning and 40.9 MB in the end (delta: -14.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. [2020-12-03 17:55:27,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 44.0 MB. Free memory is still 29.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 406.81 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 23.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.68 ms. Allocated memory is still 44.0 MB. Free memory was 23.0 MB in the beginning and 21.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.74 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 20.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1687.98 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 20.4 MB in the beginning and 33.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51196.20 ms. Allocated memory is still 58.7 MB. Free memory was 33.4 MB in the beginning and 26.2 MB in the end (delta: 7.2 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. * Witness Printer took 59.03 ms. Allocated memory is still 58.7 MB. Free memory was 26.2 MB in the beginning and 40.9 MB in the end (delta: -14.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 25.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 1 SDslu, 1 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 24.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 380 SizeOfPredicates, 3 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 6 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 correct! Received shutdown request...