./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.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_1252a.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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c .............................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_1252a.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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:24,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:24,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:24,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:24,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:24,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:24,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:24,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:24,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:24,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:24,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:24,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:24,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:24,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:24,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:24,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:24,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:24,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:24,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:24,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:24,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:24,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:24,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:24,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:24,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:24,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:24,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:24,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:24,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:24,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:24,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:24,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:24,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:24,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:24,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:24,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:24,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:24,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:24,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:24,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:24,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:24,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:24,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:24,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:24,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:24,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:24,523 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:24,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:24,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:24,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:24,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:24,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:24,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:24,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:24,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:24,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:24,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:24,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:24,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:24,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:24,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:24,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:24,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:24,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:24,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:24,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:24,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:24,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:24,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:24,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:24,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:24,531 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 -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-10-20 00:40:24,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:24,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:24,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:24,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:24,757 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:24,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-20 00:40:24,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4cbe9b/5e1213c855784051851e2c11ffd4aacc/FLAG79a6ce9fd [2020-10-20 00:40:25,290 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:25,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-20 00:40:25,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4cbe9b/5e1213c855784051851e2c11ffd4aacc/FLAG79a6ce9fd [2020-10-20 00:40:25,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4cbe9b/5e1213c855784051851e2c11ffd4aacc [2020-10-20 00:40:25,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:25,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:25,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:25,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:25,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:25,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be20985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25, skipping insertion in model container [2020-10-20 00:40:25,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:25,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:25,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:25,997 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:26,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:26,039 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:26,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26 WrapperNode [2020-10-20 00:40:26,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:26,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:26,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:26,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:26,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:26,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:26,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:26,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:26,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (1/1) ... [2020-10-20 00:40:26,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:26,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:26,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:26,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:26,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (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 00:40:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:40:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:26,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:26,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:40:26,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:26,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:26,581 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:26,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26 BoogieIcfgContainer [2020-10-20 00:40:26,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:26,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:26,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:26,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:26,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:25" (1/3) ... [2020-10-20 00:40:26,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfe8a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:26, skipping insertion in model container [2020-10-20 00:40:26,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:26" (2/3) ... [2020-10-20 00:40:26,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfe8a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:26, skipping insertion in model container [2020-10-20 00:40:26,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26" (3/3) ... [2020-10-20 00:40:26,593 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-10-20 00:40:26,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:26,615 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:26,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:26,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:26,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:26,666 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:26,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:26,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:26,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:26,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:26,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:26,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:26,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:26,690 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:26,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265738886] [2020-10-20 00:40:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:26,838 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 00:40:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265738886] [2020-10-20 00:40:26,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:26,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675550664] [2020-10-20 00:40:26,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:26,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:26,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:26,861 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:26,880 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:26,882 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:26,893 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:26,893 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:26,899 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 00:40:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:26,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:26,932 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:26,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:26,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:26,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:26,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:26,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:26,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18985038] [2020-10-20 00:40:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,036 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 00:40:27,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18985038] [2020-10-20 00:40:27,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629387001] [2020-10-20 00:40:27,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:27,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:27,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:27,040 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-20 00:40:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,111 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-20 00:40:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:27,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,113 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:40:27,113 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:40:27,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:40:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-20 00:40:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:27,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,122 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:27,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:40:27,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:27,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-20 00:40:27,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:27,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124308833] [2020-10-20 00:40:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,180 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 00:40:27,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124308833] [2020-10-20 00:40:27,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865250814] [2020-10-20 00:40:27,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:27,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:27,183 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,262 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:27,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:40:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,264 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:27,264 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:27,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:27,271 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-20 00:40:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,271 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:27,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:40:27,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:27,273 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-20 00:40:27,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204283867] [2020-10-20 00:40:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,328 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 00:40:27,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204283867] [2020-10-20 00:40:27,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:27,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278362686] [2020-10-20 00:40:27,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:27,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:27,330 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,384 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-20 00:40:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:27,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:40:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,385 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:40:27,385 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 00:40:27,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 00:40:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-20 00:40:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:27,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-20 00:40:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,394 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:27,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:27,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:40:27,396 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-20 00:40:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:27,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409237956] [2020-10-20 00:40:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,443 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 00:40:27,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409237956] [2020-10-20 00:40:27,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165125875] [2020-10-20 00:40:27,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:27,446 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,503 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:27,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,504 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:27,505 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:27,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:27,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-20 00:40:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,511 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:27,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:27,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:40:27,513 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:27,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:27,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802876230] [2020-10-20 00:40:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:27,546 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:27,586 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:27,636 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:27,636 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:27,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:40:27,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:27 BoogieIcfgContainer [2020-10-20 00:40:27,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:27,684 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:27,685 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:27,685 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:27,686 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26" (3/4) ... [2020-10-20 00:40:27,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:27,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:27,696 INFO L168 Benchmark]: Toolchain (without parser) took 2021.37 ms. Allocated memory was 35.1 MB in the beginning and 49.8 MB in the end (delta: 14.7 MB). Free memory was 9.2 MB in the beginning and 20.6 MB in the end (delta: -11.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,698 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 34.6 MB. Free memory was 13.8 MB in the beginning and 13.7 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.17 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 8.4 MB in the beginning and 26.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.44 ms. Allocated memory is still 44.0 MB. Free memory was 26.1 MB in the beginning and 24.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,707 INFO L168 Benchmark]: Boogie Preprocessor took 31.48 ms. Allocated memory is still 44.0 MB. Free memory was 24.1 MB in the beginning and 22.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,708 INFO L168 Benchmark]: RCFGBuilder took 465.44 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 13.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,710 INFO L168 Benchmark]: TraceAbstraction took 1099.34 ms. Allocated memory was 44.6 MB in the beginning and 49.8 MB in the end (delta: 5.2 MB). Free memory was 13.0 MB in the beginning and 21.4 MB in the end (delta: -8.4 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:27,714 INFO L168 Benchmark]: Witness Printer took 7.82 ms. Allocated memory is still 49.8 MB. Free memory was 21.0 MB in the beginning and 20.6 MB in the end (delta: 400.9 kB). Peak memory consumption was 400.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:27,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 34.6 MB. Free memory was 13.8 MB in the beginning and 13.7 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 362.17 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 8.4 MB in the beginning and 26.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.44 ms. Allocated memory is still 44.0 MB. Free memory was 26.1 MB in the beginning and 24.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.48 ms. Allocated memory is still 44.0 MB. Free memory was 24.1 MB in the beginning and 22.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 465.44 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 13.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1099.34 ms. Allocated memory was 44.6 MB in the beginning and 49.8 MB in the end (delta: 5.2 MB). Free memory was 13.0 MB in the beginning and 21.4 MB in the end (delta: -8.4 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 7.82 ms. Allocated memory is still 49.8 MB. Free memory was 21.0 MB in the beginning and 20.6 MB in the end (delta: 400.9 kB). Peak memory consumption was 400.9 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 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 00:40:29,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:29,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:29,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:29,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:29,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:29,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:29,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:29,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:29,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:29,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:29,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:29,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:29,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:29,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:29,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:29,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:29,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:29,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:29,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:29,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:29,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:29,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:29,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:29,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:29,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:29,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:29,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:29,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:29,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:29,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:29,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:29,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:29,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:29,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:29,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:29,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:29,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:29,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:29,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:29,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:29,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:30,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:30,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:30,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:30,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:30,044 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:30,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:30,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:30,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:30,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:30,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:30,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:30,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:30,048 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:30,048 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:30,048 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:30,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:30,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:30,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:30,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:30,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:30,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:30,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:30,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:30,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:30,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:30,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:30,060 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:30,060 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:30,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:30,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:30,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:30,061 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 -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-10-20 00:40:30,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:30,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:30,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:30,286 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:30,287 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:30,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-20 00:40:30,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c59e8916/79189976a1a74aa5ac738cf3110597f3/FLAGac5e5272c [2020-10-20 00:40:30,786 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:30,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-10-20 00:40:30,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c59e8916/79189976a1a74aa5ac738cf3110597f3/FLAGac5e5272c [2020-10-20 00:40:31,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c59e8916/79189976a1a74aa5ac738cf3110597f3 [2020-10-20 00:40:31,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:31,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:31,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:31,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:31,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:31,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68628539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31, skipping insertion in model container [2020-10-20 00:40:31,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:31,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:31,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:31,379 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:31,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:31,440 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:31,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31 WrapperNode [2020-10-20 00:40:31,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:31,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:31,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:31,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:31,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:31,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:31,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:31,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:31,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (1/1) ... [2020-10-20 00:40:31,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:31,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:31,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:31,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:31,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (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 00:40:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:31,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:40:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:31,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:40:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:32,008 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:32,009 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:32,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:32 BoogieIcfgContainer [2020-10-20 00:40:32,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:32,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:32,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:32,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:32,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:31" (1/3) ... [2020-10-20 00:40:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b9111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:32, skipping insertion in model container [2020-10-20 00:40:32,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:31" (2/3) ... [2020-10-20 00:40:32,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b9111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:32, skipping insertion in model container [2020-10-20 00:40:32,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:32" (3/3) ... [2020-10-20 00:40:32,023 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-10-20 00:40:32,038 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:32,046 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:32,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:32,092 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:32,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:32,093 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:32,093 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:32,093 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:32,093 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:32,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:32,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:32,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:32,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:32,120 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:32,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:32,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106492488] [2020-10-20 00:40:32,149 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 00:40:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:32,294 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 00:40:32,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:32,298 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 00:40:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106492488] [2020-10-20 00:40:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:32,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919065750] [2020-10-20 00:40:32,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:32,324 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:32,345 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:32,347 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:32,358 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:32,358 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:32,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:32,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:32,399 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:32,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:32,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:32,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:32,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:32,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:32,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542224597] [2020-10-20 00:40:32,615 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 00:40:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:32,738 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 00:40:32,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:32,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542224597] [2020-10-20 00:40:32,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:32,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610766136] [2020-10-20 00:40:32,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:32,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:32,761 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-20 00:40:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:32,855 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-20 00:40:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:32,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:40:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:32,857 INFO L225 Difference]: With dead ends: 68 [2020-10-20 00:40:32,857 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 00:40:32,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 00:40:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-20 00:40:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:32,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:32,868 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:32,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:32,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:32,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:33,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:33,091 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:33,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:33,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:33,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892864290] [2020-10-20 00:40:33,096 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 00:40:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:33,244 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 00:40:33,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:33,278 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 00:40:33,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892864290] [2020-10-20 00:40:33,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:33,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-20 00:40:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238078187] [2020-10-20 00:40:33,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:33,280 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:33,342 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-20 00:40:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:33,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:33,344 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:40:33,344 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:40:33,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:40:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:40:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:40:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-20 00:40:33,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-20 00:40:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:33,351 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-20 00:40:33,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-20 00:40:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:40:33,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:33,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:33,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:40:33,566 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-20 00:40:33,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:33,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471468600] [2020-10-20 00:40:33,569 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 00:40:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:33,687 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 00:40:33,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:33,722 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 00:40:33,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471468600] [2020-10-20 00:40:33,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:33,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:33,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149629628] [2020-10-20 00:40:33,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:33,728 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-20 00:40:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:33,838 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-20 00:40:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:33,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:40:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:33,842 INFO L225 Difference]: With dead ends: 61 [2020-10-20 00:40:33,845 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 00:40:33,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 00:40:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-20 00:40:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-20 00:40:33,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-20 00:40:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:33,855 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-20 00:40:33,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-20 00:40:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:33,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:33,856 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 00:40:34,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:40:34,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-20 00:40:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:34,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42171533] [2020-10-20 00:40:34,072 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 00:40:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:40:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:34,169 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 00:40:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:34,206 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 00:40:34,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42171533] [2020-10-20 00:40:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:40:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476934122] [2020-10-20 00:40:34,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:34,209 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-20 00:40:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:34,221 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-20 00:40:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:40:34,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 00:40:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:34,222 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:40:34,222 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:40:34,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:40:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:40:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-20 00:40:34,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-20 00:40:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:34,229 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-20 00:40:34,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-20 00:40:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:34,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:34,230 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 00:40:34,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:40:34,442 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-20 00:40:34,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:34,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621007452] [2020-10-20 00:40:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:40:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:34,574 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 00:40:34,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:34,615 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 00:40:34,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621007452] [2020-10-20 00:40:34,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:34,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 00:40:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844358666] [2020-10-20 00:40:34,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:40:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:40:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:40:34,618 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-20 00:40:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:34,741 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-20 00:40:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:40:34,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:40:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:34,742 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:40:34,743 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 00:40:34,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:40:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 00:40:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-20 00:40:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:40:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-20 00:40:34,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-20 00:40:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:34,750 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-20 00:40:34,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:40:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-20 00:40:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:40:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:34,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:40:34,964 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-20 00:40:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:34,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442807232] [2020-10-20 00:40:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:35,061 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 00:40:35,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:35,085 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 00:40:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442807232] [2020-10-20 00:40:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:35,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-20 00:40:35,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146512167] [2020-10-20 00:40:35,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:40:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:40:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:35,088 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-20 00:40:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:35,153 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-20 00:40:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:40:35,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 00:40:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:35,155 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:40:35,155 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:40:35,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:40:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:40:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 00:40:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 00:40:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-20 00:40:35,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-20 00:40:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:35,160 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-20 00:40:35,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:40:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-20 00:40:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:40:35,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:35,162 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] [2020-10-20 00:40:35,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-20 00:40:35,375 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-20 00:40:35,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:35,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900320479] [2020-10-20 00:40:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:40:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:35,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:40:35,563 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 00:40:35,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:35,843 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 00:40:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900320479] [2020-10-20 00:40:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-20 00:40:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263946642] [2020-10-20 00:40:35,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:40:35,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:40:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:40:35,846 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-10-20 00:40:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:36,081 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-20 00:40:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:40:36,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-20 00:40:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:36,082 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:40:36,082 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:40:36,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-20 00:40:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:40:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:40:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:40:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:40:36,084 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-20 00:40:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:36,084 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:40:36,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:40:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:40:36,085 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:40:36,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-20 00:40:36,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:40:36,540 INFO L277 CegarLoopResult]: At program point L85(lines 67 86) the Hoare annotation is: true [2020-10-20 00:40:36,540 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-10-20 00:40:36,540 INFO L274 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-10-20 00:40:36,540 INFO L270 CegarLoopResult]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-20 00:40:36,540 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-20 00:40:36,541 INFO L274 CegarLoopResult]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L270 CegarLoopResult]: At program point L64(lines 55 65) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= |ULTIMATE.start___signbit_float_#res| (_ bv0 32)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-20 00:40:36,542 INFO L274 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L274 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-10-20 00:40:36,542 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 28) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-10-20 00:40:36,543 INFO L274 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-10-20 00:40:36,543 INFO L274 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-10-20 00:40:36,543 INFO L270 CegarLoopResult]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-20 00:40:36,543 INFO L274 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-10-20 00:40:36,543 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-10-20 00:40:36,544 INFO L270 CegarLoopResult]: At program point L41(lines 21 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-10-20 00:40:36,544 INFO L270 CegarLoopResult]: At program point L41-1(lines 21 42) the Hoare annotation is: (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-20 00:40:36,544 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:40:36,544 INFO L274 CegarLoopResult]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2020-10-20 00:40:36,544 INFO L270 CegarLoopResult]: At program point L58-2(lines 58 62) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-10-20 00:40:36,545 INFO L274 CegarLoopResult]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2020-10-20 00:40:36,545 INFO L274 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-10-20 00:40:36,545 INFO L274 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-10-20 00:40:36,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:36 BoogieIcfgContainer [2020-10-20 00:40:36,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:36,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:36,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:36,566 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:36,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:32" (3/4) ... [2020-10-20 00:40:36,570 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:40:36,581 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-20 00:40:36,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:40:36,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 00:40:36,582 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:40:36,613 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-20 00:40:36,614 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-20 00:40:36,614 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-20 00:40:36,615 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-20 00:40:36,615 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-10-20 00:40:36,653 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:40:36,653 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:36,656 INFO L168 Benchmark]: Toolchain (without parser) took 5540.12 ms. Allocated memory was 43.0 MB in the beginning and 58.2 MB in the end (delta: 15.2 MB). Free memory was 26.1 MB in the beginning and 31.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,657 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.96 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 25.2 MB in the beginning and 27.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.85 ms. Allocated memory is still 46.1 MB. Free memory was 27.2 MB in the beginning and 25.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,659 INFO L168 Benchmark]: Boogie Preprocessor took 38.83 ms. Allocated memory is still 46.1 MB. Free memory was 25.1 MB in the beginning and 23.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,659 INFO L168 Benchmark]: RCFGBuilder took 479.42 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 18.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,660 INFO L168 Benchmark]: TraceAbstraction took 4552.65 ms. Allocated memory was 46.1 MB in the beginning and 58.2 MB in the end (delta: 12.1 MB). Free memory was 18.4 MB in the beginning and 36.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,661 INFO L168 Benchmark]: Witness Printer took 88.02 ms. Allocated memory is still 58.2 MB. Free memory was 36.4 MB in the beginning and 31.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:36,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 318.96 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 25.2 MB in the beginning and 27.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 50.85 ms. Allocated memory is still 46.1 MB. Free memory was 27.2 MB in the beginning and 25.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 38.83 ms. Allocated memory is still 46.1 MB. Free memory was 25.1 MB in the beginning and 23.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 479.42 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 18.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4552.65 ms. Allocated memory was 46.1 MB in the beginning and 58.2 MB in the end (delta: 12.1 MB). Free memory was 18.4 MB in the beginning and 36.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.3 GB. * Witness Printer took 88.02 ms. Allocated memory is still 58.2 MB. Free memory was 36.4 MB in the beginning and 31.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (~Pluszero~LONGDOUBLE() == x && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 204 SDslu, 399 SDs, 0 SdLazy, 150 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 168 HoareAnnotationTreeSize, 8 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 14682 SizeOfPredicates, 38 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...