./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72f53508ad2da2a8e23f1a2d8fc400a48c7a0120 ............................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72f53508ad2da2a8e23f1a2d8fc400a48c7a0120 .................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:35,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:35,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:35,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:35,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:35,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:35,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:35,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:35,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:35,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:35,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:35,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:35,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:35,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:35,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:35,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:35,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:35,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:35,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:35,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:35,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:35,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:35,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:35,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:35,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:35,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:35,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:35,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:35,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:35,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:35,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:35,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:35,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:35,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:35,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:35,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:35,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:35,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:35,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:35,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:35,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:35,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:35,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:35,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:35,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:35,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:35,904 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:35,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:35,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:35,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:35,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:35,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:35,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:35,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:35,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:35,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:35,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:35,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:35,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:35,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:35,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:35,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72f53508ad2da2a8e23f1a2d8fc400a48c7a0120 [2020-10-20 00:40:36,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:36,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:36,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:36,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:36,133 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:36,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2020-10-20 00:40:36,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203acd9ad/960c1f6006ce45df816db69ab5f8b62a/FLAG6b0da314c [2020-10-20 00:40:36,670 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:36,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2020-10-20 00:40:36,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203acd9ad/960c1f6006ce45df816db69ab5f8b62a/FLAG6b0da314c [2020-10-20 00:40:37,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203acd9ad/960c1f6006ce45df816db69ab5f8b62a [2020-10-20 00:40:37,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:37,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:37,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:37,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:37,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:37,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e6bc6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37, skipping insertion in model container [2020-10-20 00:40:37,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:37,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:37,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:37,310 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:37,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:37,346 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:37,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37 WrapperNode [2020-10-20 00:40:37,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:37,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:37,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:37,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:37,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:37,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:37,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:37,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:37,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... [2020-10-20 00:40:37,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:37,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:37,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:37,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:37,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:37,711 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:37,712 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:40:37,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:37 BoogieIcfgContainer [2020-10-20 00:40:37,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:37,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:37,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:37,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:37,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:37" (1/3) ... [2020-10-20 00:40:37,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e91353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:37, skipping insertion in model container [2020-10-20 00:40:37,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:37" (2/3) ... [2020-10-20 00:40:37,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e91353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:37, skipping insertion in model container [2020-10-20 00:40:37,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:37" (3/3) ... [2020-10-20 00:40:37,724 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2020-10-20 00:40:37,739 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:37,756 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:37,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:37,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:37,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:37,821 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:37,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:37,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:37,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:37,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:37,822 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:37,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:37,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:37,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1235864049, now seen corresponding path program 1 times [2020-10-20 00:40:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:37,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412824787] [2020-10-20 00:40:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412824787] [2020-10-20 00:40:38,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:38,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:38,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958863596] [2020-10-20 00:40:38,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:38,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:38,039 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:38,054 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:38,056 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:38,066 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:38,067 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:38,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-20 00:40:38,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-20 00:40:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:38,103 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-20 00:40:38,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-20 00:40:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:38,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:38,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:38,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:38,105 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1503627718, now seen corresponding path program 1 times [2020-10-20 00:40:38,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:38,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102284138] [2020-10-20 00:40:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:38,146 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:38,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:38,207 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:38,207 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:38,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:38,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:38 BoogieIcfgContainer [2020-10-20 00:40:38,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:38,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:38,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:38,247 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:38,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:37" (3/4) ... [2020-10-20 00:40:38,251 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:38,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:38,254 INFO L168 Benchmark]: Toolchain (without parser) took 1222.72 ms. Allocated memory was 35.7 MB in the beginning and 46.1 MB in the end (delta: 10.5 MB). Free memory was 16.6 MB in the beginning and 11.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 15.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,255 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 34.1 MB. Free memory was 10.2 MB in the beginning and 10.2 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.46 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 25.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.88 ms. Allocated memory is still 44.0 MB. Free memory was 25.5 MB in the beginning and 23.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,258 INFO L168 Benchmark]: Boogie Preprocessor took 23.14 ms. Allocated memory is still 44.0 MB. Free memory was 23.7 MB in the beginning and 22.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,259 INFO L168 Benchmark]: RCFGBuilder took 308.95 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 22.3 MB in the beginning and 21.7 MB in the end (delta: 530.6 kB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,260 INFO L168 Benchmark]: TraceAbstraction took 531.08 ms. Allocated memory is still 46.1 MB. Free memory was 21.3 MB in the beginning and 12.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,261 INFO L168 Benchmark]: Witness Printer took 4.38 ms. Allocated memory is still 46.1 MB. Free memory was 12.0 MB in the beginning and 11.7 MB in the end (delta: 267.4 kB). Peak memory consumption was 267.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:38,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 34.1 MB. Free memory was 10.2 MB in the beginning and 10.2 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 310.46 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 25.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 33.88 ms. Allocated memory is still 44.0 MB. Free memory was 25.5 MB in the beginning and 23.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.14 ms. Allocated memory is still 44.0 MB. Free memory was 23.7 MB in the beginning and 22.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 308.95 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 22.3 MB in the beginning and 21.7 MB in the end (delta: 530.6 kB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 531.08 ms. Allocated memory is still 46.1 MB. Free memory was 21.3 MB in the beginning and 12.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Witness Printer took 4.38 ms. Allocated memory is still 46.1 MB. Free memory was 12.0 MB in the beginning and 11.7 MB in the end (delta: 267.4 kB). Peak memory consumption was 267.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryFLOATComparisonOperation at line 39, overapproximation of someBinaryArithmeticFLOAToperation at line 31. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L11] COND FALSE !(!cond) [L11] COND FALSE !(!cond) [L23] float exp = 1.0 ; [L24] float term = 1.0 ; [L25] unsigned int count = 1 ; [L26] float result = 2*(1/(1-x)) ; [L27] int temp ; [L29] COND TRUE 1 [L31] term = term * (x/count) [L32] exp = exp + term [L33] count++ [L35] temp = __VERIFIER_nondet_int() [L36] COND TRUE temp ==0 [L13] COND TRUE !(cond) [L8] __assert_fail("0", "loop1-1.c", 8, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 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=17occurred 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, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:40,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:40,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:40,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:40,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:40,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:40,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:40,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:40,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:40,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:40,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:40,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:40,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:40,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:40,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:40,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:40,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:40,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:40,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:40,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:40,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:40,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:40,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:40,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:40,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:40,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:40,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:40,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:40,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:40,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:40,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:40,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:40,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:40,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:40,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:40,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:40,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:40,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:40,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:40,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:40,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:40,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:40,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:40,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:40,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:40,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:40,587 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:40,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:40,588 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:40,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:40,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:40,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:40,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:40,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:40,589 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:40,589 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:40,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:40,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:40,590 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:40,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:40,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:40,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:40,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:40,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:40,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:40,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:40,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:40,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:40,593 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:40,593 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:40,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:40,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:40,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:40,594 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72f53508ad2da2a8e23f1a2d8fc400a48c7a0120 [2020-10-20 00:40:40,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:40,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:40,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:40,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:40,828 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:40,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2020-10-20 00:40:40,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d40f8df1/8c0aefa005f2481ea22f69ce36565016/FLAG05bb3a072 [2020-10-20 00:40:41,418 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:41,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2020-10-20 00:40:41,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d40f8df1/8c0aefa005f2481ea22f69ce36565016/FLAG05bb3a072 [2020-10-20 00:40:41,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d40f8df1/8c0aefa005f2481ea22f69ce36565016 [2020-10-20 00:40:41,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:41,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:41,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:41,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:41,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:41,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce9a417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:41, skipping insertion in model container [2020-10-20 00:40:41,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:41" (1/1) ... [2020-10-20 00:40:41,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:41,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:42,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:42,135 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:42,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:42,200 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:42,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42 WrapperNode [2020-10-20 00:40:42,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:42,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:42,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:42,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:42,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:42,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:42,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:42,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:42,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... [2020-10-20 00:40:42,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:42,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:42,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:42,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:42,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:42,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:42,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:42,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:42,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:45,049 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:45,050 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:40:45,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:45 BoogieIcfgContainer [2020-10-20 00:40:45,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:45,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:45,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:45,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:45,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:41" (1/3) ... [2020-10-20 00:40:45,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c6cb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:45, skipping insertion in model container [2020-10-20 00:40:45,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:42" (2/3) ... [2020-10-20 00:40:45,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c6cb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:45, skipping insertion in model container [2020-10-20 00:40:45,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:45" (3/3) ... [2020-10-20 00:40:45,060 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2020-10-20 00:40:45,081 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:45,089 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:45,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:45,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:45,120 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:45,120 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:45,120 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:45,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:45,121 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:45,121 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:45,121 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:45,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:45,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:45,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1235864049, now seen corresponding path program 1 times [2020-10-20 00:40:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:45,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756956396] [2020-10-20 00:40:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:45,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756956396] [2020-10-20 00:40:45,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:45,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251280618] [2020-10-20 00:40:45,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:45,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:45,505 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:45,520 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:45,521 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:45,531 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:45,531 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:45,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-20 00:40:45,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-20 00:40:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:45,564 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-20 00:40:45,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-20 00:40:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:45,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:45,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:45,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:45,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1503627718, now seen corresponding path program 1 times [2020-10-20 00:40:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:45,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130699141] [2020-10-20 00:40:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:40:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:48,352 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-10-20 00:40:48,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130699141] [2020-10-20 00:40:48,364 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:40:48,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412515098] [2020-10-20 00:40:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:40:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 00:40:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:49,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:40:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757659375] [2020-10-20 00:40:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 00:41:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:17,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:17,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:41:17,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:41:17,372 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:41:17,374 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:41:17,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:18,011 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:41:18,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:41:18 BoogieIcfgContainer [2020-10-20 00:41:18,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:41:18,012 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:41:18,012 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:41:18,013 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:41:18,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:45" (3/4) ... [2020-10-20 00:41:18,017 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:41:18,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:41:18,019 INFO L168 Benchmark]: Toolchain (without parser) took 36215.08 ms. Allocated memory was 40.9 MB in the beginning and 45.6 MB in the end (delta: 4.7 MB). Free memory was 19.2 MB in the beginning and 29.0 MB in the end (delta: -9.8 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:41:18,020 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.02 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 18.4 MB in the end (delta: -131.5 kB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.78 ms. Allocated memory is still 41.4 MB. Free memory was 18.4 MB in the beginning and 16.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,022 INFO L168 Benchmark]: Boogie Preprocessor took 71.79 ms. Allocated memory is still 41.4 MB. Free memory was 16.6 MB in the beginning and 15.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,023 INFO L168 Benchmark]: RCFGBuilder took 2703.61 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.1 MB in the beginning and 17.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,024 INFO L168 Benchmark]: TraceAbstraction took 32958.90 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 17.4 MB in the beginning and 29.3 MB in the end (delta: -11.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,025 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 45.6 MB. Free memory was 29.3 MB in the beginning and 29.0 MB in the end (delta: 331.9 kB). Peak memory consumption was 331.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:18,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 390.02 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 18.4 MB in the end (delta: -131.5 kB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 72.78 ms. Allocated memory is still 41.4 MB. Free memory was 18.4 MB in the beginning and 16.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 71.79 ms. Allocated memory is still 41.4 MB. Free memory was 16.6 MB in the beginning and 15.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 2703.61 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.1 MB in the beginning and 17.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 32958.90 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 17.4 MB in the beginning and 29.3 MB in the end (delta: -11.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Witness Printer took 4.63 ms. Allocated memory is still 45.6 MB. Free memory was 29.3 MB in the beginning and 29.0 MB in the end (delta: 331.9 kB). Peak memory consumption was 331.9 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L11] COND FALSE !(!cond) [L11] COND FALSE !(!cond) [L23] float exp = 1.0 ; [L24] float term = 1.0 ; [L25] unsigned int count = 1 ; [L26] float result = 2*(1/(1-x)) ; [L27] int temp ; [L29] COND TRUE 1 [L31] term = term * (x/count) [L32] exp = exp + term [L33] count++ [L35] temp = __VERIFIER_nondet_int() [L36] COND TRUE temp ==0 [L13] COND TRUE !(cond) [L8] __assert_fail("0", "loop1-1.c", 8, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 32.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 162 SizeOfPredicates, 0 NumberOfNonLiveVariables, 38 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...