./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 36a0a55241cede481b157c1ab9f348d708a5b166 .................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 36a0a55241cede481b157c1ab9f348d708a5b166 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:21,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:21,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:21,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:21,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:21,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:21,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:21,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:21,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:21,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:21,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:21,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:21,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:21,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:21,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:21,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:21,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:21,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:21,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:21,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:21,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:21,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:21,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:21,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:21,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:21,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:21,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:21,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:21,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:21,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:21,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:21,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:21,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:21,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:21,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:21,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:21,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:21,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:21,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:21,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:21,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:21,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:21,061 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:21,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:21,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:21,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:21,062 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:21,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:21,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:21,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:21,064 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:21,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:21,064 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:21,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:21,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:21,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:21,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:21,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:21,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:21,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:21,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer 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(__VERIFIER_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 -> 36a0a55241cede481b157c1ab9f348d708a5b166 [2019-10-22 09:01:21,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:21,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:21,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:21,104 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:21,104 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:21,105 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-10-22 09:01:21,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/a7799225d/7b4c672799b04ea19f8883a231156f91/FLAG14c8f6eb7 [2019-10-22 09:01:21,513 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:21,514 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-10-22 09:01:21,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/a7799225d/7b4c672799b04ea19f8883a231156f91/FLAG14c8f6eb7 [2019-10-22 09:01:21,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/a7799225d/7b4c672799b04ea19f8883a231156f91 [2019-10-22 09:01:21,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:21,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:21,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:21,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:21,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:21,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:21" (1/1) ... [2019-10-22 09:01:21,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e671e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:21, skipping insertion in model container [2019-10-22 09:01:21,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:21" (1/1) ... [2019-10-22 09:01:21,960 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:21,977 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:22,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:22,143 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:22,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:22,290 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:22,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22 WrapperNode [2019-10-22 09:01:22,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:22,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:22,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:22,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:22,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:22,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:22,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:22,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:22,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... [2019-10-22 09:01:22,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:22,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:22,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:22,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:22,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:01:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-22 09:01:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:01:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:01:22,684 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:22,685 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 09:01:22,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:22 BoogieIcfgContainer [2019-10-22 09:01:22,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:22,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:22,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:22,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:22,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:21" (1/3) ... [2019-10-22 09:01:22,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9a5929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:22, skipping insertion in model container [2019-10-22 09:01:22,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:22" (2/3) ... [2019-10-22 09:01:22,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9a5929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:22, skipping insertion in model container [2019-10-22 09:01:22,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:22" (3/3) ... [2019-10-22 09:01:22,693 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2019-10-22 09:01:22,702 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:22,708 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:22,720 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:22,759 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:22,759 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:22,760 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:22,760 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:22,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:22,771 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:22,771 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:22,771 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 09:01:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:01:22,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:22,803 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:22,805 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 09:01:22,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:22,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673770547] [2019-10-22 09:01:22,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:22,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:22,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:22,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673770547] [2019-10-22 09:01:22,974 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:22,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:01:22,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414816510] [2019-10-22 09:01:22,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:01:22,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:01:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:22,990 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 09:01:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:23,007 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 09:01:23,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:01:23,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 09:01:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:23,018 INFO L225 Difference]: With dead ends: 62 [2019-10-22 09:01:23,018 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:01:23,021 INFO L600 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 [2019-10-22 09:01:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:01:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 09:01:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:01:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 09:01:23,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 09:01:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:23,053 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 09:01:23,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:01:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 09:01:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:23,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:23,053 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:23,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 09:01:23,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:23,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46152236] [2019-10-22 09:01:23,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:23,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46152236] [2019-10-22 09:01:23,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:23,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:23,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868872179] [2019-10-22 09:01:23,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:23,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:23,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:23,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:23,118 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-10-22 09:01:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:23,182 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-10-22 09:01:23,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:23,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 09:01:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:23,183 INFO L225 Difference]: With dead ends: 53 [2019-10-22 09:01:23,183 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 09:01:23,184 INFO L600 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 [2019-10-22 09:01:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 09:01:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-10-22 09:01:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 09:01:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 09:01:23,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 09:01:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:23,190 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 09:01:23,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 09:01:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:23,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:23,192 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:23,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-10-22 09:01:23,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:23,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881521758] [2019-10-22 09:01:23,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:23,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881521758] [2019-10-22 09:01:23,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:23,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:23,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651556428] [2019-10-22 09:01:23,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:23,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:23,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:23,247 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 09:01:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:23,292 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-22 09:01:23,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:23,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 09:01:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:23,294 INFO L225 Difference]: With dead ends: 55 [2019-10-22 09:01:23,294 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 09:01:23,295 INFO L600 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 [2019-10-22 09:01:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 09:01:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-10-22 09:01:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 09:01:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 09:01:23,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-10-22 09:01:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:23,300 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 09:01:23,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 09:01:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:23,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:23,301 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:23,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 09:01:23,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:23,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72637040] [2019-10-22 09:01:23,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:23,379 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:23,379 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:23 BoogieIcfgContainer [2019-10-22 09:01:23,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:23,400 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:23,400 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:23,400 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:23,401 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:22" (3/4) ... [2019-10-22 09:01:23,403 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 09:01:23,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:23,405 INFO L168 Benchmark]: Toolchain (without parser) took 1460.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -126.4 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:23,406 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:23,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:23,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:23,407 INFO L168 Benchmark]: Boogie Preprocessor took 52.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:23,408 INFO L168 Benchmark]: RCFGBuilder took 295.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:23,408 INFO L168 Benchmark]: TraceAbstraction took 712.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:23,409 INFO L168 Benchmark]: Witness Printer took 3.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:23,412 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 346.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 295.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 712.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. * Witness Printer took 3.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 64. Possible FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:25,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:25,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:25,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:25,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:25,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:25,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:25,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:25,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:25,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:25,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:25,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:25,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:25,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:25,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:25,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:25,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:25,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:25,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:25,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:25,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:25,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:25,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:25,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:25,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:25,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:25,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:25,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:25,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:25,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:25,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:25,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:25,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:25,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:25,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:25,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:25,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:25,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:25,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:25,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:25,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:25,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 09:01:25,501 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:25,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:25,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:25,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:25,502 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:25,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:25,503 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:25,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:25,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:25,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:25,505 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 09:01:25,506 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 09:01:25,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:25,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 09:01:25,506 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer 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(__VERIFIER_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 -> 36a0a55241cede481b157c1ab9f348d708a5b166 [2019-10-22 09:01:25,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:25,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:25,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:25,546 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:25,547 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:25,547 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-10-22 09:01:25,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/42788d219/7aa1fb20f7e940539a99207f08a0b796/FLAGd3dd35119 [2019-10-22 09:01:25,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:25,919 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-10-22 09:01:25,924 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/42788d219/7aa1fb20f7e940539a99207f08a0b796/FLAGd3dd35119 [2019-10-22 09:01:26,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/data/42788d219/7aa1fb20f7e940539a99207f08a0b796 [2019-10-22 09:01:26,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:26,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:26,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:26,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:26,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:26,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f0dc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26, skipping insertion in model container [2019-10-22 09:01:26,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,350 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:26,367 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:26,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:26,537 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:26,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:26,584 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:26,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26 WrapperNode [2019-10-22 09:01:26,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:26,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:26,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:26,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:26,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:26,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:26,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:26,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:26,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... [2019-10-22 09:01:26,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:26,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:26,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:26,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:26,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:01:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 09:01:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-10-22 09:01:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:01:27,017 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:27,018 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 09:01:27,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:27 BoogieIcfgContainer [2019-10-22 09:01:27,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:27,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:27,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:27,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:27,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:26" (1/3) ... [2019-10-22 09:01:27,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb7e0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:27, skipping insertion in model container [2019-10-22 09:01:27,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:26" (2/3) ... [2019-10-22 09:01:27,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb7e0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:27, skipping insertion in model container [2019-10-22 09:01:27,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:27" (3/3) ... [2019-10-22 09:01:27,025 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2019-10-22 09:01:27,034 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:27,040 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:27,050 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:27,070 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:27,071 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:27,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:27,071 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:27,071 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:27,071 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:27,071 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:27,071 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 09:01:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:01:27,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:27,109 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:27,112 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 09:01:27,126 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:27,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299517083] [2019-10-22 09:01:27,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 09:01:27,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299517083] [2019-10-22 09:01:27,214 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:27,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 09:01:27,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37499348] [2019-10-22 09:01:27,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:01:27,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:01:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:27,230 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 09:01:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:27,248 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 09:01:27,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:01:27,249 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 09:01:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:27,259 INFO L225 Difference]: With dead ends: 62 [2019-10-22 09:01:27,259 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:01:27,262 INFO L600 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 [2019-10-22 09:01:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:01:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 09:01:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:01:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 09:01:27,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 09:01:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:27,293 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 09:01:27,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:01:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 09:01:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:27,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:27,294 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:27,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 09:01:27,495 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 09:01:27,496 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:27,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574316673] [2019-10-22 09:01:27,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:01:27,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574316673] [2019-10-22 09:01:27,597 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:27,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 09:01:27,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909281052] [2019-10-22 09:01:27,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:27,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:27,599 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-10-22 09:01:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:27,723 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-22 09:01:27,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:27,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-22 09:01:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:27,727 INFO L225 Difference]: With dead ends: 68 [2019-10-22 09:01:27,727 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 09:01:27,728 INFO L600 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 [2019-10-22 09:01:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 09:01:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-10-22 09:01:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 09:01:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 09:01:27,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 09:01:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:27,740 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 09:01:27,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 09:01:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:27,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:27,741 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:27,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 09:01:27,947 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 09:01:27,949 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:27,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424963215] [2019-10-22 09:01:27,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:28,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424963215] [2019-10-22 09:01:28,057 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:28,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-10-22 09:01:28,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265147995] [2019-10-22 09:01:28,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:28,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:28,060 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 09:01:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,117 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-10-22 09:01:28,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:28,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 09:01:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,119 INFO L225 Difference]: With dead ends: 52 [2019-10-22 09:01:28,119 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:01:28,120 INFO L600 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 [2019-10-22 09:01:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:01:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:01:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-22 09:01:28,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-10-22 09:01:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,124 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-22 09:01:28,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-22 09:01:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 09:01:28,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,125 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:28,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-10-22 09:01:28,326 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:28,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-10-22 09:01:28,327 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:28,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075186804] [2019-10-22 09:01:28,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:01:28,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075186804] [2019-10-22 09:01:28,414 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:28,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 09:01:28,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016127162] [2019-10-22 09:01:28,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:28,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:28,416 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-10-22 09:01:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,479 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-10-22 09:01:28,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:28,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 09:01:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,480 INFO L225 Difference]: With dead ends: 61 [2019-10-22 09:01:28,481 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 09:01:28,481 INFO L600 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 [2019-10-22 09:01:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 09:01:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-10-22 09:01:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:01:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-22 09:01:28,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-10-22 09:01:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,486 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-22 09:01:28,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-22 09:01:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 09:01:28,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,488 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:28,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-10-22 09:01:28,688 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-10-22 09:01:28,689 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:28,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573598302] [2019-10-22 09:01:28,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:28,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,756 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573598302] [2019-10-22 09:01:28,777 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:28,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 09:01:28,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203098273] [2019-10-22 09:01:28,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:28,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:28,778 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-22 09:01:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,788 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-22 09:01:28,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:01:28,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-22 09:01:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,790 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:01:28,790 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:01:28,790 INFO L600 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 [2019-10-22 09:01:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:01:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 09:01:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:01:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-22 09:01:28,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-10-22 09:01:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,794 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-22 09:01:28,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-22 09:01:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 09:01:28,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,795 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:29,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-10-22 09:01:29,003 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-10-22 09:01:29,004 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:29,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584402523] [2019-10-22 09:01:29,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:29,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:29,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584402523] [2019-10-22 09:01:29,154 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:29,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 09:01:29,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209439999] [2019-10-22 09:01:29,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:29,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:29,155 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-10-22 09:01:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:29,270 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-22 09:01:29,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:29,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-22 09:01:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:29,271 INFO L225 Difference]: With dead ends: 40 [2019-10-22 09:01:29,271 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 09:01:29,272 INFO L600 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 [2019-10-22 09:01:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 09:01:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-10-22 09:01:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:01:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-22 09:01:29,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-10-22 09:01:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:29,279 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-22 09:01:29,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-22 09:01:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:29,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:29,280 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:29,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-10-22 09:01:29,480 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-10-22 09:01:29,481 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:29,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562558313] [2019-10-22 09:01:29,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:29,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562558313] [2019-10-22 09:01:29,575 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:29,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-10-22 09:01:29,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417791800] [2019-10-22 09:01:29,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:29,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:29,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:29,577 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-10-22 09:01:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:29,622 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-22 09:01:29,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:29,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 09:01:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:29,624 INFO L225 Difference]: With dead ends: 43 [2019-10-22 09:01:29,624 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:29,624 INFO L600 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 [2019-10-22 09:01:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 09:01:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 09:01:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-10-22 09:01:29,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-10-22 09:01:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:29,628 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-10-22 09:01:29,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-10-22 09:01:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:01:29,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:29,629 INFO L380 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] [2019-10-22 09:01:29,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-10-22 09:01:29,829 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:29,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-10-22 09:01:29,830 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:29,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031860243] [2019-10-22 09:01:29,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/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 [2019-10-22 09:01:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:29,998 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-10-22 09:01:29,998 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:30,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-10-22 09:01:30,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:30 BoogieIcfgContainer [2019-10-22 09:01:30,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:30,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:30,245 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:30,246 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:30,246 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:27" (3/4) ... [2019-10-22 09:01:30,248 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:30,310 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2dd5deeb-b54b-4325-bd3c-6de764f303af/bin/uautomizer/witness.graphml [2019-10-22 09:01:30,310 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:30,318 INFO L168 Benchmark]: Toolchain (without parser) took 3985.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 951.0 MB in the beginning and 923.0 MB in the end (delta: 28.0 MB). Peak memory consumption was 182.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:30,318 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:30,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:30,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -203.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:30,325 INFO L168 Benchmark]: Boogie Preprocessor took 26.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:30,325 INFO L168 Benchmark]: RCFGBuilder took 314.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:30,326 INFO L168 Benchmark]: TraceAbstraction took 3225.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 923.0 MB in the end (delta: 193.9 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:30,326 INFO L168 Benchmark]: Witness Printer took 64.84 ms. Allocated memory is still 1.2 GB. Free memory is still 923.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:30,328 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 92.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -203.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 314.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3225.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 923.0 MB in the end (delta: 193.9 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. * Witness Printer took 64.84 ms. Allocated memory is still 1.2 GB. Free memory is still 923.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 70]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND TRUE w == 0x00000000 || w == 0x80000000 [L22] return 2; [L36] COND FALSE !(__fpclassify_float(x) == 0) [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND TRUE w == 0x00000000 || w == 0x80000000 [L22] return 2; [L38] COND FALSE !(__fpclassify_float(y) == 0) [L41] EXPR x < y ? x : y [L41] return x < y ? x : y; [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L45] __uint32_t w; [L48] ieee_float_shape_type gf_u; [L49] gf_u.value = (x) [L50] EXPR gf_u.word [L50] (w) = gf_u.word [L53] return (w & 0x80000000) != 0; [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7783 SizeOfPredicates, 27 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...