./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e1a00cf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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 0.2.0-0e1a00c [2020-11-29 15:55:21,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:21,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:22,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:22,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:22,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:22,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:22,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:22,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:22,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:22,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:22,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:22,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:22,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:22,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:22,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:22,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:22,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:22,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:22,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:22,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:22,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:22,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:22,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:22,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:22,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:22,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:22,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:22,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:22,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:22,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:22,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:22,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:22,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:22,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:22,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:22,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:22,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:22,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:22,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:22,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:22,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 15:55:22,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:22,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:22,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:22,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:22,116 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:22,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:22,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:22,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 15:55:22,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:22,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:22,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:22,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:22,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:22,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:22,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:22,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:22,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:22,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:22,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:22,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:22,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:22,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:22,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:22,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:22,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:22,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 15:55:22,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 15:55:22,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:22,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:22,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-11-29 15:55:22,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:22,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:22,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:22,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:22,619 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:22,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-11-29 15:55:22,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f10e2de/8d5ad57ed97b4f46be3451b5961b02c1/FLAG21abec3ca [2020-11-29 15:55:23,430 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:23,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-11-29 15:55:23,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f10e2de/8d5ad57ed97b4f46be3451b5961b02c1/FLAG21abec3ca [2020-11-29 15:55:23,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f10e2de/8d5ad57ed97b4f46be3451b5961b02c1 [2020-11-29 15:55:23,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:23,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:23,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:23,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:23,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:23,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dbb8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23, skipping insertion in model container [2020-11-29 15:55:23,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:23,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:23,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:23,819 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:23,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:23,892 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:23,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23 WrapperNode [2020-11-29 15:55:23,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:23,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:23,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:23,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:23,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:23,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:23,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:23,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:23,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (1/1) ... [2020-11-29 15:55:23,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:23,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:23,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:23,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:23,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (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 [2020-11-29 15:55:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 15:55:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 15:55:24,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:24,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:24,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 15:55:24,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:24,437 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:24,441 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:24,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:24 BoogieIcfgContainer [2020-11-29 15:55:24,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:24,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:24,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:24,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:24,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:23" (1/3) ... [2020-11-29 15:55:24,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:24, skipping insertion in model container [2020-11-29 15:55:24,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:23" (2/3) ... [2020-11-29 15:55:24,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:24, skipping insertion in model container [2020-11-29 15:55:24,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:24" (3/3) ... [2020-11-29 15:55:24,463 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-11-29 15:55:24,500 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:24,507 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:24,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:24,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:24,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:24,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:24,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:24,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:24,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:24,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:24,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:24,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:24,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:24,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:24,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065477619] [2020-11-29 15:55:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:24,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065477619] [2020-11-29 15:55:24,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:24,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 15:55:24,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485107463] [2020-11-29 15:55:24,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:24,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:24,864 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:24,889 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:24,892 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:24,903 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:24,904 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:24,907 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 [2020-11-29 15:55:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:24,952 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:24,952 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:24,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:24,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:24,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:24,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 15:55:24,955 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802100382] [2020-11-29 15:55:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:25,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802100382] [2020-11-29 15:55:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:25,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:25,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554561750] [2020-11-29 15:55:25,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:25,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:25,057 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-11-29 15:55:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:25,138 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-11-29 15:55:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:25,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 15:55:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:25,141 INFO L225 Difference]: With dead ends: 53 [2020-11-29 15:55:25,141 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 15:55:25,142 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 [2020-11-29 15:55:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 15:55:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-11-29 15:55:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:25,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:25,152 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:25,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 15:55:25,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:25,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:25,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 15:55:25,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-11-29 15:55:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:25,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066452701] [2020-11-29 15:55:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066452701] [2020-11-29 15:55:25,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:25,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:25,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781900677] [2020-11-29 15:55:25,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:25,214 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:25,301 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:25,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 15:55:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:25,304 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:25,305 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:25,307 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 [2020-11-29 15:55:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:25,319 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-11-29 15:55:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:25,321 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:25,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 15:55:25,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:25,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:25,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 15:55:25,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:25,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-11-29 15:55:25,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:25,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657211865] [2020-11-29 15:55:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657211865] [2020-11-29 15:55:25,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:25,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:25,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581651308] [2020-11-29 15:55:25,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:25,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:25,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:25,422 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:25,470 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-11-29 15:55:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:25,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 15:55:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:25,472 INFO L225 Difference]: With dead ends: 57 [2020-11-29 15:55:25,473 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 15:55:25,474 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 [2020-11-29 15:55:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 15:55:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-11-29 15:55:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:25,480 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-11-29 15:55:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:25,480 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:25,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:25,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:25,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 15:55:25,483 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:25,484 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-11-29 15:55:25,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:25,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182992969] [2020-11-29 15:55:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:25,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182992969] [2020-11-29 15:55:25,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:25,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568192117] [2020-11-29 15:55:25,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:25,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:25,540 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:25,613 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:25,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:25,616 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:25,618 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:25,619 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 [2020-11-29 15:55:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:25,630 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-11-29 15:55:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:25,631 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:25,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:25,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:25,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 15:55:25,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:25,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969210096] [2020-11-29 15:55:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:25,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:25,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:25,797 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 15:55:25,797 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 15:55:25,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 15:55:25,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:25 BoogieIcfgContainer [2020-11-29 15:55:25,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:25,838 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:25,838 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:25,838 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:25,839 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:24" (3/4) ... [2020-11-29 15:55:25,843 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 15:55:25,843 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:25,846 INFO L168 Benchmark]: Toolchain (without parser) took 2361.82 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.9 MB in the beginning and 35.4 MB in the end (delta: -10.5 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,847 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory was 18.0 MB in the beginning and 17.9 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:25,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.34 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 25.3 MB in the end (delta: -969.2 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.44 ms. Allocated memory is still 48.2 MB. Free memory was 25.3 MB in the beginning and 23.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,849 INFO L168 Benchmark]: Boogie Preprocessor took 34.05 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 22.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,850 INFO L168 Benchmark]: RCFGBuilder took 467.64 ms. Allocated memory is still 48.2 MB. Free memory was 21.9 MB in the beginning and 26.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,852 INFO L168 Benchmark]: TraceAbstraction took 1388.68 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.6 MB in the beginning and 35.8 MB in the end (delta: -10.2 MB). Peak memory consumption was 936.3 kB. Max. memory is 16.1 GB. [2020-11-29 15:55:25,852 INFO L168 Benchmark]: Witness Printer took 5.45 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 35.4 MB in the end (delta: 360.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:25,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory was 18.0 MB in the beginning and 17.9 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 402.34 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 25.3 MB in the end (delta: -969.2 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.44 ms. Allocated memory is still 48.2 MB. Free memory was 25.3 MB in the beginning and 23.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.05 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 22.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 467.64 ms. Allocated memory is still 48.2 MB. Free memory was 21.9 MB in the beginning and 26.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1388.68 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.6 MB in the beginning and 35.8 MB in the end (delta: -10.2 MB). Peak memory consumption was 936.3 kB. Max. memory is 16.1 GB. * Witness Printer took 5.45 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 35.4 MB in the end (delta: 360.6 kB). There was no memory consumed. Max. memory is 16.1 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: 1.2s, 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, 0.2s 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 0.2.0-0e1a00c [2020-11-29 15:55:28,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:28,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:28,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:28,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:28,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:28,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:28,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:28,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:28,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:28,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:28,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:28,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:28,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:28,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:28,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:28,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:28,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:28,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:28,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:28,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:28,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:28,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:28,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:28,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:28,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:28,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:28,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:28,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:28,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:28,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:28,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:28,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:28,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:28,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:28,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:28,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:28,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:28,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:28,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:28,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:28,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 15:55:28,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:28,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:28,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:28,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:28,629 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:28,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:28,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:28,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:28,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:28,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:28,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:28,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:28,634 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 15:55:28,634 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 15:55:28,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:28,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:28,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:28,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:28,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:28,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:28,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:28,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:28,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:28,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:28,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:28,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:28,638 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 15:55:28,638 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 15:55:28,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:28,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:28,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 15:55:28,639 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-11-29 15:55:29,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:29,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:29,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:29,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:29,095 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:29,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-11-29 15:55:29,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19969c56/05445d0f69bd4fe7a3fc9d731e2f6576/FLAGd376b6f66 [2020-11-29 15:55:29,815 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:29,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-11-29 15:55:29,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19969c56/05445d0f69bd4fe7a3fc9d731e2f6576/FLAGd376b6f66 [2020-11-29 15:55:30,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19969c56/05445d0f69bd4fe7a3fc9d731e2f6576 [2020-11-29 15:55:30,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:30,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:30,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:30,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:30,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:30,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b75d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30, skipping insertion in model container [2020-11-29 15:55:30,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:30,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:30,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:30,461 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:30,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:30,513 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:30,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30 WrapperNode [2020-11-29 15:55:30,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:30,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:30,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:30,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:30,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:30,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:30,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:30,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:30,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (1/1) ... [2020-11-29 15:55:30,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:30,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:30,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:30,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:30,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (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 [2020-11-29 15:55:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 15:55:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 15:55:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-29 15:55:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:31,440 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:31,441 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:31,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:31 BoogieIcfgContainer [2020-11-29 15:55:31,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:31,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:31,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:31,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:31,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:30" (1/3) ... [2020-11-29 15:55:31,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a7abe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:31, skipping insertion in model container [2020-11-29 15:55:31,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:30" (2/3) ... [2020-11-29 15:55:31,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a7abe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:31, skipping insertion in model container [2020-11-29 15:55:31,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:31" (3/3) ... [2020-11-29 15:55:31,455 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-11-29 15:55:31,473 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:31,477 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:31,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:31,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:31,527 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:31,528 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:31,528 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:31,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:31,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:31,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:31,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:31,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:31,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:31,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:31,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:31,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911837717] [2020-11-29 15:55:31,576 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 [2020-11-29 15:55:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 15:55:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:31,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911837717] [2020-11-29 15:55:31,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:31,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 15:55:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385531244] [2020-11-29 15:55:31,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:31,837 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:31,859 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:31,860 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:31,871 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:31,872 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:31,875 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 [2020-11-29 15:55:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:31,914 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:31,914 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:31,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:31,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:31,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:32,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 15:55:32,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:32,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:32,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613801788] [2020-11-29 15:55:32,137 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 [2020-11-29 15:55:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613801788] [2020-11-29 15:55:32,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:32,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:32,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832241254] [2020-11-29 15:55:32,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:32,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:32,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:32,302 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-11-29 15:55:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:32,403 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-29 15:55:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:32,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 15:55:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:32,405 INFO L225 Difference]: With dead ends: 68 [2020-11-29 15:55:32,406 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 15:55:32,407 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 [2020-11-29 15:55:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 15:55:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-29 15:55:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:32,415 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:32,416 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:32,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:32,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:32,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:32,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 15:55:32,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:32,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434600886] [2020-11-29 15:55:32,639 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 [2020-11-29 15:55:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434600886] [2020-11-29 15:55:32,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:32,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-29 15:55:32,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331567756] [2020-11-29 15:55:32,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:32,847 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:32,902 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-29 15:55:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:32,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:32,904 INFO L225 Difference]: With dead ends: 52 [2020-11-29 15:55:32,904 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 15:55:32,905 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 [2020-11-29 15:55:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 15:55:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 15:55:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 15:55:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 15:55:32,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-11-29 15:55:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:32,911 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 15:55:32,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 15:55:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 15:55:32,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:32,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:33,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 15:55:33,123 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-11-29 15:55:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295089522] [2020-11-29 15:55:33,126 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 [2020-11-29 15:55:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:33,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:33,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295089522] [2020-11-29 15:55:33,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:33,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:33,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730990324] [2020-11-29 15:55:33,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:33,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:33,269 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-11-29 15:55:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:33,346 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-11-29 15:55:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:33,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 15:55:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:33,350 INFO L225 Difference]: With dead ends: 61 [2020-11-29 15:55:33,351 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 15:55:33,352 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 [2020-11-29 15:55:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 15:55:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-11-29 15:55:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 15:55:33,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-11-29 15:55:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:33,370 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 15:55:33,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-29 15:55:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:33,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:33,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:33,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 15:55:33,579 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-11-29 15:55:33,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:33,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159679551] [2020-11-29 15:55:33,582 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 [2020-11-29 15:55:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 15:55:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:33,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159679551] [2020-11-29 15:55:33,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:33,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 15:55:33,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912986692] [2020-11-29 15:55:33,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:33,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:33,737 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-11-29 15:55:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:33,750 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-11-29 15:55:33,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 15:55:33,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 15:55:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:33,751 INFO L225 Difference]: With dead ends: 38 [2020-11-29 15:55:33,752 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 15:55:33,752 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 [2020-11-29 15:55:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 15:55:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 15:55:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-29 15:55:33,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-11-29 15:55:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:33,758 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-29 15:55:33,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-29 15:55:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:33,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:33,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:33,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 15:55:33,976 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-11-29 15:55:33,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:33,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735780403] [2020-11-29 15:55:33,979 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 [2020-11-29 15:55:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 15:55:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735780403] [2020-11-29 15:55:34,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-11-29 15:55:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945302045] [2020-11-29 15:55:34,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 15:55:34,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:34,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 15:55:34,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 15:55:34,214 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-11-29 15:55:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:34,303 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 15:55:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 15:55:34,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-29 15:55:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:34,304 INFO L225 Difference]: With dead ends: 40 [2020-11-29 15:55:34,304 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 15:55:34,305 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 [2020-11-29 15:55:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 15:55:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 15:55:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 15:55:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-29 15:55:34,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-11-29 15:55:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:34,311 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-29 15:55:34,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 15:55:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 15:55:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 15:55:34,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:34,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:34,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 15:55:34,529 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-11-29 15:55:34,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:34,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500329784] [2020-11-29 15:55:34,531 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 [2020-11-29 15:55:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500329784] [2020-11-29 15:55:34,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:34,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 15:55:34,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076394352] [2020-11-29 15:55:34,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 15:55:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 15:55:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 15:55:34,704 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-29 15:55:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:34,765 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 15:55:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 15:55:34,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 15:55:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:34,767 INFO L225 Difference]: With dead ends: 43 [2020-11-29 15:55:34,767 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 15:55:34,768 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 [2020-11-29 15:55:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 15:55:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 15:55:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 15:55:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-11-29 15:55:34,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-11-29 15:55:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:34,774 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-11-29 15:55:34,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 15:55:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-11-29 15:55:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 15:55:34,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:34,775 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] [2020-11-29 15:55:34,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 15:55:34,989 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-11-29 15:55:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:34,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946417390] [2020-11-29 15:55:34,991 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 [2020-11-29 15:55:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 15:55:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:35,200 INFO L626 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 15:55:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946417390] [2020-11-29 15:55:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-11-29 15:55:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349647397] [2020-11-29 15:55:35,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 15:55:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 15:55:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-11-29 15:55:35,565 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-11-29 15:55:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:35,803 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-11-29 15:55:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 15:55:35,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-11-29 15:55:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:35,804 INFO L225 Difference]: With dead ends: 23 [2020-11-29 15:55:35,804 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 15:55:35,805 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 [2020-11-29 15:55:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 15:55:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 15:55:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 15:55:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 15:55:35,806 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-29 15:55:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:35,806 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 15:55:35,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 15:55:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 15:55:35,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 15:55:36,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 15:55:36,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 15:55:36,247 INFO L265 CegarLoopResult]: At program point L85(lines 67 86) the Hoare annotation is: true [2020-11-29 15:55:36,247 INFO L262 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L258 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))) [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-11-29 15:55:36,248 INFO L262 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-11-29 15:55:36,249 INFO L262 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-11-29 15:55:36,249 INFO L262 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-11-29 15:55:36,249 INFO L262 CegarLoopResult]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L258 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))) [2020-11-29 15:55:36,250 INFO L262 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L262 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L262 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-11-29 15:55:36,250 INFO L258 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)))) [2020-11-29 15:55:36,251 INFO L262 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-11-29 15:55:36,251 INFO L262 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-11-29 15:55:36,251 INFO L258 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))) [2020-11-29 15:55:36,251 INFO L262 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-11-29 15:55:36,251 INFO L262 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-11-29 15:55:36,251 INFO L258 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)))) [2020-11-29 15:55:36,252 INFO L258 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))) [2020-11-29 15:55:36,252 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 15:55:36,252 INFO L262 CegarLoopResult]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2020-11-29 15:55:36,253 INFO L258 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))) [2020-11-29 15:55:36,253 INFO L262 CegarLoopResult]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2020-11-29 15:55:36,253 INFO L262 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-11-29 15:55:36,253 INFO L262 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-11-29 15:55:36,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:36 BoogieIcfgContainer [2020-11-29 15:55:36,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:36,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:36,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:36,277 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:36,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:31" (3/4) ... [2020-11-29 15:55:36,281 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 15:55:36,295 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-29 15:55:36,295 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 15:55:36,296 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 15:55:36,296 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 15:55:36,326 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() [2020-11-29 15:55:36,327 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() [2020-11-29 15:55:36,327 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() [2020-11-29 15:55:36,328 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() [2020-11-29 15:55:36,329 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() [2020-11-29 15:55:36,358 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-11-29 15:55:36,359 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:36,361 INFO L168 Benchmark]: Toolchain (without parser) took 6177.09 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 27.0 MB in the beginning and 38.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,362 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory was 21.3 MB in the beginning and 21.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:36,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.83 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 26.8 MB in the end (delta: -376.9 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.27 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 25.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,363 INFO L168 Benchmark]: Boogie Preprocessor took 50.97 ms. Allocated memory is still 50.3 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:36,364 INFO L168 Benchmark]: RCFGBuilder took 823.18 ms. Allocated memory is still 50.3 MB. Free memory was 23.4 MB in the beginning and 28.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,365 INFO L168 Benchmark]: TraceAbstraction took 4829.86 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 28.0 MB in the beginning and 42.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,365 INFO L168 Benchmark]: Witness Printer took 82.49 ms. Allocated memory is still 73.4 MB. Free memory was 42.5 MB in the beginning and 38.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:36,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory was 21.3 MB in the beginning and 21.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.83 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 26.8 MB in the end (delta: -376.9 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.27 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 25.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.97 ms. Allocated memory is still 50.3 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 823.18 ms. Allocated memory is still 50.3 MB. Free memory was 23.4 MB in the beginning and 28.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4829.86 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 28.0 MB in the beginning and 42.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. * Witness Printer took 82.49 ms. Allocated memory is still 73.4 MB. Free memory was 42.5 MB in the beginning and 38.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: 4.4s, 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, 0.7s 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, 1.1s 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...