./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1271a.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/float-newlib/float_req_bl_1271a.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 01000c3fb4ceae3cc298117e852ec32c23e12ae3 ......................................................................................................................................................................................................................................................................................................................... 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/float-newlib/float_req_bl_1271a.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 01000c3fb4ceae3cc298117e852ec32c23e12ae3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 00:40:32,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:32,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:32,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:32,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:32,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:32,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:32,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:32,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:32,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:32,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:32,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:32,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:32,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:32,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:32,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:32,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:32,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:32,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:32,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:32,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:32,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:32,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:32,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:32,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:32,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:32,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:32,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:32,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:32,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:32,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:32,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:32,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:32,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:32,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:32,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:32,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:32,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:32,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:32,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:32,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:32,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:32,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:32,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:32,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:32,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:32,231 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:32,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:32,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:32,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:32,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:32,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:32,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:32,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:32,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:32,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:32,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:32,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:32,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:32,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:32,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:32,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:32,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:32,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:32,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:32,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:32,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:32,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:32,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:32,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:32,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:32,237 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 -> 01000c3fb4ceae3cc298117e852ec32c23e12ae3 [2020-10-20 00:40:32,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:32,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:32,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:32,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:32,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:32,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1271a.c [2020-10-20 00:40:32,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b643e830/e1ea6ac3b7be4503a26022ed44ca7b57/FLAGed2cef9fd [2020-10-20 00:40:33,057 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:33,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1271a.c [2020-10-20 00:40:33,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b643e830/e1ea6ac3b7be4503a26022ed44ca7b57/FLAGed2cef9fd [2020-10-20 00:40:33,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b643e830/e1ea6ac3b7be4503a26022ed44ca7b57 [2020-10-20 00:40:33,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:33,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:33,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:33,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:33,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:33,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:33,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336fde30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33, skipping insertion in model container [2020-10-20 00:40:33,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:33,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:33,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:33,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:33,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:33,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:33,953 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:33,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33 WrapperNode [2020-10-20 00:40:33,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:33,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:33,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:33,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:33,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:33,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:34,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:34,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:34,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:34,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (1/1) ... [2020-10-20 00:40:34,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:34,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:34,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:34,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:34,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (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 00:40:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-20 00:40:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:40:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:40:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:40:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:35,005 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:35,005 INFO L298 CfgBuilder]: Removed 56 assume(true) statements. [2020-10-20 00:40:35,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:35 BoogieIcfgContainer [2020-10-20 00:40:35,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:35,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:35,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:35,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:35,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:33" (1/3) ... [2020-10-20 00:40:35,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d6bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:35, skipping insertion in model container [2020-10-20 00:40:35,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:33" (2/3) ... [2020-10-20 00:40:35,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d6bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:35, skipping insertion in model container [2020-10-20 00:40:35,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:35" (3/3) ... [2020-10-20 00:40:35,016 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1271a.c [2020-10-20 00:40:35,027 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:35,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:35,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:35,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:35,067 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:35,067 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:35,067 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:35,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:35,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:35,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:35,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-10-20 00:40:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:35,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:35,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:35,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1113208416, now seen corresponding path program 1 times [2020-10-20 00:40:35,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:35,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295373119] [2020-10-20 00:40:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:35,240 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 00:40:35,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295373119] [2020-10-20 00:40:35,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:35,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:35,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509146021] [2020-10-20 00:40:35,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:35,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:35,265 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 2 states. [2020-10-20 00:40:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:35,312 INFO L93 Difference]: Finished difference Result 219 states and 367 transitions. [2020-10-20 00:40:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:35,314 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-20 00:40:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:35,327 INFO L225 Difference]: With dead ends: 219 [2020-10-20 00:40:35,327 INFO L226 Difference]: Without dead ends: 106 [2020-10-20 00:40:35,331 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 00:40:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-20 00:40:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-20 00:40:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 00:40:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-10-20 00:40:35,374 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 18 [2020-10-20 00:40:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:35,375 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-10-20 00:40:35,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-10-20 00:40:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:40:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:35,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:35,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:35,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash 53585807, now seen corresponding path program 1 times [2020-10-20 00:40:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751327433] [2020-10-20 00:40:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:35,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:35,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:35,685 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:35,686 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:35,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:35,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:35 BoogieIcfgContainer [2020-10-20 00:40:35,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:35,796 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:35,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:35,796 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:35,797 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:35" (3/4) ... [2020-10-20 00:40:35,800 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:35,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:35,805 INFO L168 Benchmark]: Toolchain (without parser) took 2339.81 ms. Allocated memory was 34.6 MB in the beginning and 49.3 MB in the end (delta: 14.7 MB). Free memory was 16.2 MB in the beginning and 27.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,807 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.51 ms. Allocated memory was 34.6 MB in the beginning and 43.0 MB in the end (delta: 8.4 MB). Free memory was 15.2 MB in the beginning and 20.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,810 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.92 ms. Allocated memory is still 43.0 MB. Free memory was 20.1 MB in the beginning and 16.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,811 INFO L168 Benchmark]: Boogie Preprocessor took 64.90 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 16.6 MB in the beginning and 25.3 MB in the end (delta: -8.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,813 INFO L168 Benchmark]: RCFGBuilder took 909.70 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 25.3 MB in the beginning and 26.2 MB in the end (delta: -879.5 kB). Peak memory consumption was 18.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,816 INFO L168 Benchmark]: TraceAbstraction took 787.24 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 25.5 MB in the beginning and 27.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,822 INFO L168 Benchmark]: Witness Printer took 4.21 ms. Allocated memory is still 49.3 MB. Free memory was 27.4 MB in the beginning and 27.1 MB in the end (delta: 364.4 kB). Peak memory consumption was 364.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:35,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 484.51 ms. Allocated memory was 34.6 MB in the beginning and 43.0 MB in the end (delta: 8.4 MB). Free memory was 15.2 MB in the beginning and 20.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 76.92 ms. Allocated memory is still 43.0 MB. Free memory was 20.1 MB in the beginning and 16.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 64.90 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 16.6 MB in the beginning and 25.3 MB in the end (delta: -8.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 909.70 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 25.3 MB in the beginning and 26.2 MB in the end (delta: -879.5 kB). Peak memory consumption was 18.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 787.24 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 25.5 MB in the beginning and 27.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 14.3 GB. * Witness Printer took 4.21 ms. Allocated memory is still 49.3 MB. Free memory was 27.4 MB in the beginning and 27.1 MB in the end (delta: 364.4 kB). Peak memory consumption was 364.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 213, overapproximation of someBinaryArithmeticFLOAToperation at line 120, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L14] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L234] float x = 0.0f / 0.0f; [L235] float y = __VERIFIER_nondet_float(); [L217] __int32_t ix; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L219] ieee_float_shape_type gf_u; [L220] gf_u.value = (x) [L221] EXPR gf_u.word [L221] (ix) = gf_u.word [L223] ix &= 0x7fffffff [L224] return (((ix) < 0x7f800000L)); VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L237] COND TRUE isfinite_float(y) [L84] float a = x, b = y, t1, t2, y1, y2, w; [L85] __int32_t j, k, ha, hb; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L88] ieee_float_shape_type gf_u; [L89] gf_u.value = (x) [L90] EXPR gf_u.word [L90] (ha) = gf_u.word [L92] ha &= 0x7fffffffL VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L94] ieee_float_shape_type gf_u; [L95] gf_u.value = (y) [L96] EXPR gf_u.word [L96] (hb) = gf_u.word [L98] hb &= 0x7fffffffL VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L99] COND TRUE hb > ha [L100] a = y [L101] b = x [L102] j = ha [L103] ha = hb [L104] hb = j VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L110] ieee_float_shape_type sf_u; [L111] sf_u.word = (ha) [L112] EXPR sf_u.value [L112] (a) = sf_u.value [L115] ieee_float_shape_type sf_u; [L116] sf_u.word = (hb) [L117] EXPR sf_u.value [L117] (b) = sf_u.value [L119] COND TRUE (ha - hb) > 0xf000000L [L120] return a + b; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L238] float res = __ieee754_hypotf(x, y); [L213] return x != x; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L240] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1271a.c", 3, "reach_error") VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 111 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 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=111occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 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 00:40:37,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:37,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:38,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:38,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:38,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:38,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:38,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:38,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:38,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:38,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:38,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:38,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:38,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:38,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:38,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:38,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:38,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:38,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:38,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:38,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:38,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:38,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:38,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:38,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:38,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:38,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:38,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:38,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:38,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:38,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:38,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:38,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:38,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:38,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:38,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:38,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:38,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:38,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:38,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:38,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:38,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:38,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:38,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:38,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:38,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:38,175 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:38,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:38,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:38,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:38,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:38,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:38,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:38,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:38,178 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:38,178 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:38,178 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:38,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:38,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:38,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:38,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:38,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:38,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:38,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:38,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:38,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:38,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:38,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:38,182 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:38,182 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:38,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:38,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:38,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:38,183 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 -> 01000c3fb4ceae3cc298117e852ec32c23e12ae3 [2020-10-20 00:40:38,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:38,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:38,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:38,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:38,457 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:38,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1271a.c [2020-10-20 00:40:38,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f157c631/aaa669820ffe48bebaf5d943f8b8f157/FLAG480ea6929 [2020-10-20 00:40:39,040 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:39,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1271a.c [2020-10-20 00:40:39,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f157c631/aaa669820ffe48bebaf5d943f8b8f157/FLAG480ea6929 [2020-10-20 00:40:39,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f157c631/aaa669820ffe48bebaf5d943f8b8f157 [2020-10-20 00:40:39,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:39,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:39,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:39,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:39,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:39,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67caf844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39, skipping insertion in model container [2020-10-20 00:40:39,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:39,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:39,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:39,782 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:39,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:39,906 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:39,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39 WrapperNode [2020-10-20 00:40:39,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:39,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:39,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:39,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:39,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:39,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:39,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:39,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:39,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:40,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:40,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:40,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:40,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:40,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:40,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:40,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:40,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (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 00:40:40,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2020-10-20 00:40:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:40:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:40,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:40:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:40:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:46,424 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:46,424 INFO L298 CfgBuilder]: Removed 56 assume(true) statements. [2020-10-20 00:40:46,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:46 BoogieIcfgContainer [2020-10-20 00:40:46,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:46,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:46,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:46,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:46,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:39" (1/3) ... [2020-10-20 00:40:46,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9a137d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:46, skipping insertion in model container [2020-10-20 00:40:46,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (2/3) ... [2020-10-20 00:40:46,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9a137d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:46, skipping insertion in model container [2020-10-20 00:40:46,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:46" (3/3) ... [2020-10-20 00:40:46,435 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1271a.c [2020-10-20 00:40:46,449 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:46,470 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:46,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:46,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:46,511 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:46,511 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:46,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:46,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:46,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:46,512 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:46,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-10-20 00:40:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:46,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:46,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:46,538 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1113208416, now seen corresponding path program 1 times [2020-10-20 00:40:46,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:46,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335206284] [2020-10-20 00:40:46,561 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 00:40:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:46,794 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 00:40:46,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:46,806 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 00:40:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335206284] [2020-10-20 00:40:46,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:46,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:46,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751768780] [2020-10-20 00:40:46,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:46,834 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 2 states. [2020-10-20 00:40:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:46,869 INFO L93 Difference]: Finished difference Result 219 states and 367 transitions. [2020-10-20 00:40:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:46,871 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-20 00:40:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:46,885 INFO L225 Difference]: With dead ends: 219 [2020-10-20 00:40:46,886 INFO L226 Difference]: Without dead ends: 106 [2020-10-20 00:40:46,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 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 00:40:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-20 00:40:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-20 00:40:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 00:40:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-10-20 00:40:46,945 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 18 [2020-10-20 00:40:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:46,946 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-10-20 00:40:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-10-20 00:40:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:40:46,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:46,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:47,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:47,163 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 53585807, now seen corresponding path program 1 times [2020-10-20 00:40:47,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:47,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726284883] [2020-10-20 00:40:47,165 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 00:40:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:40:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:47,777 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 00:40:47,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:48,798 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 00:40:48,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726284883] [2020-10-20 00:40:48,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:48,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2020-10-20 00:40:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250780020] [2020-10-20 00:40:48,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 00:40:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 00:40:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:40:48,803 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 14 states. [2020-10-20 00:40:49,516 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-10-20 00:40:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:50,196 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2020-10-20 00:40:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:40:50,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-20 00:40:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:50,199 INFO L225 Difference]: With dead ends: 133 [2020-10-20 00:40:50,199 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 00:40:50,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:40:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 00:40:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-20 00:40:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 00:40:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-20 00:40:50,214 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 23 [2020-10-20 00:40:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:50,215 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-20 00:40:50,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 00:40:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-20 00:40:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:40:50,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:50,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:50,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:50,424 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -339441203, now seen corresponding path program 1 times [2020-10-20 00:40:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:50,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114519641] [2020-10-20 00:40:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:40:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:50,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:40:51,120 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 00:40:51,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:56,624 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-20 00:41:00,052 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-20 00:41:00,105 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 00:41:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114519641] [2020-10-20 00:41:00,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:41:00,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 18 [2020-10-20 00:41:00,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449727013] [2020-10-20 00:41:00,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 00:41:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:41:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 00:41:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:41:00,107 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 18 states. [2020-10-20 00:41:01,717 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-20 00:41:02,026 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-20 00:41:02,321 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-20 00:41:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:41:02,358 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-20 00:41:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:41:02,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-10-20 00:41:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:41:02,360 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:41:02,360 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:41:02,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-20 00:41:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:41:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-20 00:41:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 00:41:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-20 00:41:02,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 23 [2020-10-20 00:41:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:41:02,368 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-20 00:41:02,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 00:41:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-20 00:41:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:41:02,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:41:02,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:41:02,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:41:02,583 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:41:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:41:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash -305501778, now seen corresponding path program 1 times [2020-10-20 00:41:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:41:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915912641] [2020-10-20 00:41:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 00:41:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:41:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:03,445 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2020-10-20 00:41:04,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:41:04,367 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 00:41:04,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:41:05,882 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-20 00:41:06,675 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 00:41:06,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915912641] [2020-10-20 00:41:06,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:41:06,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [] total 18 [2020-10-20 00:41:06,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045949988] [2020-10-20 00:41:06,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 00:41:06,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:41:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 00:41:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:41:06,678 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 18 states. [2020-10-20 00:41:08,650 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-10-20 00:41:09,588 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-10-20 00:41:10,980 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-20 00:41:12,291 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-20 00:41:13,670 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-20 00:41:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:41:13,680 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-20 00:41:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:41:13,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-20 00:41:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:41:13,682 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:41:13,682 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:41:13,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2020-10-20 00:41:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:41:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:41:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:41:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 28 transitions. [2020-10-20 00:41:13,688 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 28 transitions. Word has length 28 [2020-10-20 00:41:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:41:13,689 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 28 transitions. [2020-10-20 00:41:13,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 00:41:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 28 transitions. [2020-10-20 00:41:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:41:13,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:41:13,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:41:13,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:41:13,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:41:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:41:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1642623758, now seen corresponding path program 1 times [2020-10-20 00:41:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:41:13,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850240945] [2020-10-20 00:41:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 00:41:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:41:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:14,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:41:14,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850240945] [2020-10-20 00:41:14,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1591252065] [2020-10-20 00:41:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:41:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 00:41:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:14,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:41:14,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:41:15,142 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 00:41:15,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:41:15,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:15,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283901263] [2020-10-20 00:41:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:41:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:41:15,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:41:15,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:41:15,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:41:15,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:41:15,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:41:15,507 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:41:15,507 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:41:16,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:41:16,137 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:41:16,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:41:16 BoogieIcfgContainer [2020-10-20 00:41:16,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:41:16,138 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:41:16,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:41:16,139 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:41:16,139 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:46" (3/4) ... [2020-10-20 00:41:16,142 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:41:16,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:41:16,144 INFO L168 Benchmark]: Toolchain (without parser) took 36748.41 ms. Allocated memory was 37.2 MB in the beginning and 65.0 MB in the end (delta: 27.8 MB). Free memory was 18.8 MB in the beginning and 10.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 35.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,145 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 34.6 MB. Free memory was 11.4 MB in the beginning and 11.3 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.53 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 17.8 MB in the beginning and 21.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.55 ms. Allocated memory is still 45.1 MB. Free memory was 21.0 MB in the beginning and 17.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,148 INFO L168 Benchmark]: Boogie Preprocessor took 80.24 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 17.8 MB in the beginning and 27.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,148 INFO L168 Benchmark]: RCFGBuilder took 6367.79 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 26.9 MB in the beginning and 12.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 17.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,149 INFO L168 Benchmark]: TraceAbstraction took 29710.35 ms. Allocated memory was 49.3 MB in the beginning and 65.0 MB in the end (delta: 15.7 MB). Free memory was 12.2 MB in the beginning and 11.4 MB in the end (delta: 786.1 kB). Peak memory consumption was 16.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,150 INFO L168 Benchmark]: Witness Printer took 4.03 ms. Allocated memory is still 65.0 MB. Free memory was 11.4 MB in the beginning and 10.8 MB in the end (delta: 662.8 kB). Peak memory consumption was 662.8 kB. Max. memory is 14.3 GB. [2020-10-20 00:41:16,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 34.6 MB. Free memory was 11.4 MB in the beginning and 11.3 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 504.53 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 17.8 MB in the beginning and 21.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 70.55 ms. Allocated memory is still 45.1 MB. Free memory was 21.0 MB in the beginning and 17.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 80.24 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 17.8 MB in the beginning and 27.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 6367.79 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 26.9 MB in the beginning and 12.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 17.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 29710.35 ms. Allocated memory was 49.3 MB in the beginning and 65.0 MB in the end (delta: 15.7 MB). Free memory was 12.2 MB in the beginning and 11.4 MB in the end (delta: 786.1 kB). Peak memory consumption was 16.5 MB. Max. memory is 14.3 GB. * Witness Printer took 4.03 ms. Allocated memory is still 65.0 MB. Free memory was 11.4 MB in the beginning and 10.8 MB in the end (delta: 662.8 kB). Peak memory consumption was 662.8 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: 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: [L14] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L234] float x = 0.0f / 0.0f; [L235] float y = __VERIFIER_nondet_float(); [L217] __int32_t ix; [L219] ieee_float_shape_type gf_u; [L220] gf_u.value = (x) [L221] EXPR gf_u.word [L221] (ix) = gf_u.word [L223] ix &= 0x7fffffff [L224] return (((ix) < 0x7f800000L)); [L237] COND TRUE isfinite_float(y) [L84] float a = x, b = y, t1, t2, y1, y2, w; [L85] __int32_t j, k, ha, hb; [L88] ieee_float_shape_type gf_u; [L89] gf_u.value = (x) [L90] EXPR gf_u.word [L90] (ha) = gf_u.word [L92] ha &= 0x7fffffffL [L94] ieee_float_shape_type gf_u; [L95] gf_u.value = (y) [L96] EXPR gf_u.word [L96] (hb) = gf_u.word [L98] hb &= 0x7fffffffL [L99] COND FALSE !(hb > ha) [L106] a = x [L107] b = y [L110] ieee_float_shape_type sf_u; [L111] sf_u.word = (ha) [L112] EXPR sf_u.value [L112] (a) = sf_u.value [L115] ieee_float_shape_type sf_u; [L116] sf_u.word = (hb) [L117] EXPR sf_u.value [L117] (b) = sf_u.value [L119] COND FALSE !((ha - hb) > 0xf000000L) [L122] k = 0 [L123] COND TRUE ha > 0x58800000L [L124] COND TRUE !((ha) < 0x7f800000L) [L125] w = a + b [L126] COND FALSE !(((ha) == 0x7f800000L)) [L128] COND TRUE ((hb) == 0x7f800000L) [L129] w = b [L130] return w; [L238] float res = __ieee754_hypotf(x, y); [L213] return x != x; [L240] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1271a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 111 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 29.6s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 197 SDtfs, 422 SDslu, 280 SDs, 0 SdLazy, 257 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 22.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred 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, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 176 ConstructedInterpolants, 72 QuantifiedInterpolants, 41399 SizeOfPredicates, 35 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...