./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 c8e4dbe5a9ab518912f1108432d43f490ec977d7 ......................................................................................................................................................................................................................................................................................................................................................... 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/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 c8e4dbe5a9ab518912f1108432d43f490ec977d7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-6b5699a [2019-11-25 08:49:41,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:49:41,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:49:41,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:49:41,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:49:41,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:49:41,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:49:41,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:49:41,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:49:41,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:49:41,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:49:41,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:49:41,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:49:41,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:49:41,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:49:41,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:49:41,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:49:41,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:49:41,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:49:41,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:49:41,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:49:41,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:49:41,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:49:41,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:49:41,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:49:41,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:49:41,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:49:41,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:49:41,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:49:41,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:49:41,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:49:41,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:49:41,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:49:41,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:49:41,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:49:41,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:49:41,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:49:41,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:49:41,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:49:41,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:49:41,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:49:41,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:49:41,813 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:49:41,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:49:41,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:49:41,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:49:41,815 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:49:41,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:49:41,815 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:49:41,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:49:41,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:49:41,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:49:41,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:49:41,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:49:41,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:49:41,816 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:49:41,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:49:41,817 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:49:41,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:49:41,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:49:41,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:49:41,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:49:41,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:49:41,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:49:41,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:49:41,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:49:41,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:49:41,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:49:41,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:49:41,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:49:41,819 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/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-25 08:49:41,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:49:42,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:49:42,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:49:42,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:49:42,010 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:49:42,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-25 08:49:42,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/1bd930c3b/1234139381a64c8cb4d99b3ef9ce5245/FLAG82bbb218e [2019-11-25 08:49:42,443 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:49:42,443 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-25 08:49:42,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/1bd930c3b/1234139381a64c8cb4d99b3ef9ce5245/FLAG82bbb218e [2019-11-25 08:49:42,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/1bd930c3b/1234139381a64c8cb4d99b3ef9ce5245 [2019-11-25 08:49:42,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:49:42,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:49:42,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:42,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:49:42,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:49:42,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475de7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42, skipping insertion in model container [2019-11-25 08:49:42,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:49:42,493 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:49:42,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:42,780 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:49:42,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:42,823 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:49:42,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42 WrapperNode [2019-11-25 08:49:42,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:42,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:42,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:49:42,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:49:42,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:42,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:49:42,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:49:42,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:49:42,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... [2019-11-25 08:49:42,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:49:42,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:49:42,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:49:42,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:49:42,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:49:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-25 08:49:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:49:42,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:49:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:49:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:49:43,252 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:49:43,252 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-25 08:49:43,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:43 BoogieIcfgContainer [2019-11-25 08:49:43,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:49:43,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:49:43,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:49:43,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:49:43,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:49:42" (1/3) ... [2019-11-25 08:49:43,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422772ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:43, skipping insertion in model container [2019-11-25 08:49:43,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:42" (2/3) ... [2019-11-25 08:49:43,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422772ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:43, skipping insertion in model container [2019-11-25 08:49:43,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:43" (3/3) ... [2019-11-25 08:49:43,276 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-25 08:49:43,284 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:49:43,304 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:49:43,315 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:49:43,345 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:49:43,346 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:49:43,348 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:49:43,349 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:49:43,349 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:49:43,349 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:49:43,349 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:49:43,349 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:49:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-25 08:49:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:49:43,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:43,376 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:43,377 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-25 08:49:43,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:43,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920714454] [2019-11-25 08:49:43,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:43,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920714454] [2019-11-25 08:49:43,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:43,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:49:43,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332118172] [2019-11-25 08:49:43,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:49:43,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:43,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:49:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:49:43,537 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-25 08:49:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:43,553 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-25 08:49:43,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:49:43,554 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-25 08:49:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:43,562 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:49:43,562 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:49:43,565 INFO L630 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 [2019-11-25 08:49:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:49:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-25 08:49:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:49:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-25 08:49:43,594 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-25 08:49:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:43,594 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-25 08:49:43,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:49:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-25 08:49:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:49:43,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:43,595 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:43,596 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-25 08:49:43,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:43,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59787136] [2019-11-25 08:49:43,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:43,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59787136] [2019-11-25 08:49:43,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:43,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:49:43,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065228545] [2019-11-25 08:49:43,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:49:43,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:49:43,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:43,661 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-11-25 08:49:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:43,751 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-25 08:49:43,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:49:43,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-25 08:49:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:43,753 INFO L225 Difference]: With dead ends: 53 [2019-11-25 08:49:43,753 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:49:43,754 INFO L630 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 [2019-11-25 08:49:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:49:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-25 08:49:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:49:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-25 08:49:43,760 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-25 08:49:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:43,760 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-25 08:49:43,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:49:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-25 08:49:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:49:43,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:43,762 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:43,762 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-11-25 08:49:43,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:43,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375841205] [2019-11-25 08:49:43,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:43,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375841205] [2019-11-25 08:49:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:43,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:49:43,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753935464] [2019-11-25 08:49:43,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:49:43,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:49:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:43,814 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-25 08:49:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:43,859 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-25 08:49:43,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:49:43,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-25 08:49:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:43,861 INFO L225 Difference]: With dead ends: 55 [2019-11-25 08:49:43,861 INFO L226 Difference]: Without dead ends: 46 [2019-11-25 08:49:43,862 INFO L630 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 [2019-11-25 08:49:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-25 08:49:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-11-25 08:49:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:49:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-25 08:49:43,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-11-25 08:49:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:43,867 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-25 08:49:43,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:49:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-25 08:49:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:49:43,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:43,868 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:43,868 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-25 08:49:43,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:43,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851557972] [2019-11-25 08:49:43,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:43,939 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:43,940 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:49:43,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:49:43 BoogieIcfgContainer [2019-11-25 08:49:43,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:49:43,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:49:43,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:49:43,964 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:49:43,964 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:43" (3/4) ... [2019-11-25 08:49:43,967 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:49:43,967 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:49:43,969 INFO L168 Benchmark]: Toolchain (without parser) took 1507.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -71.9 MB). Peak memory consumption was 38.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:43,969 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:43,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -148.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:43,970 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:43,971 INFO L168 Benchmark]: Boogie Preprocessor took 27.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:43,971 INFO L168 Benchmark]: RCFGBuilder took 363.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:43,972 INFO L168 Benchmark]: TraceAbstraction took 708.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:43,972 INFO L168 Benchmark]: Witness Printer took 3.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:43,975 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 361.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -148.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 363.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 708.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __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 0.1.24-6b5699a [2019-11-25 08:49:45,790 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-25 08:49:45,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:49:45,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:49:45,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:49:45,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:49:45,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:49:45,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:49:45,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:49:45,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:49:45,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:49:45,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:49:45,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:49:45,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:49:45,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:49:45,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:49:45,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:49:45,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:49:45,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:49:45,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:49:45,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:49:45,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:49:45,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:49:45,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:49:45,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:49:45,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:49:45,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:49:45,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:49:45,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:49:45,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:49:45,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:49:45,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-25 08:49:45,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:49:45,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:49:45,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:49:45,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:49:45,884 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:49:45,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:49:45,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:49:45,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:49:45,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:49:45,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:49:45,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:49:45,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:49:45,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:49:45,887 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:49:45,887 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:49:45,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:49:45,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:49:45,888 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:49:45,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:49:45,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:49:45,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:49:45,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:49:45,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:49:45,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:49:45,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:49:45,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:49:45,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:49:45,890 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:49:45,890 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:49:45,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:49:45,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:49:45,891 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/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-25 08:49:46,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:49:46,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:49:46,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:49:46,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:49:46,223 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:49:46,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-25 08:49:46,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/06bf0a25c/00cf07328b824150b1407eb3ee10607f/FLAG405a955b9 [2019-11-25 08:49:46,709 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:49:46,710 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-25 08:49:46,716 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/06bf0a25c/00cf07328b824150b1407eb3ee10607f/FLAG405a955b9 [2019-11-25 08:49:46,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/data/06bf0a25c/00cf07328b824150b1407eb3ee10607f [2019-11-25 08:49:46,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:49:46,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:49:46,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:46,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:49:46,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:49:46,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:46" (1/1) ... [2019-11-25 08:49:46,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2769047b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:46, skipping insertion in model container [2019-11-25 08:49:46,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:46" (1/1) ... [2019-11-25 08:49:46,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:49:46,778 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:49:46,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:46,995 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:49:47,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:47,068 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:49:47,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47 WrapperNode [2019-11-25 08:49:47,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:47,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:47,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:49:47,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:49:47,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:49:47,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:49:47,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:49:47,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:49:47,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... [2019-11-25 08:49:47,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:49:47,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:49:47,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:49:47,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:49:47,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:49:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:49:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:49:47,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:49:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-11-25 08:49:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:49:47,698 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:49:47,698 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-25 08:49:47,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:47 BoogieIcfgContainer [2019-11-25 08:49:47,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:49:47,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:49:47,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:49:47,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:49:47,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:49:46" (1/3) ... [2019-11-25 08:49:47,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cddbac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:47, skipping insertion in model container [2019-11-25 08:49:47,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:47" (2/3) ... [2019-11-25 08:49:47,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cddbac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:47, skipping insertion in model container [2019-11-25 08:49:47,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:47" (3/3) ... [2019-11-25 08:49:47,706 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-25 08:49:47,715 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:49:47,727 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:49:47,738 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:49:47,759 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:49:47,759 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:49:47,759 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:49:47,759 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:49:47,759 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:49:47,760 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:49:47,760 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:49:47,760 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:49:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-25 08:49:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:49:47,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:47,777 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:47,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-25 08:49:47,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:47,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431675073] [2019-11-25 08:49:47,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:47,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-25 08:49:47,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:47,878 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:47,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431675073] [2019-11-25 08:49:47,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:47,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:49:47,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248862722] [2019-11-25 08:49:47,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:49:47,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:49:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:49:47,902 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-25 08:49:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:47,917 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-25 08:49:47,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:49:47,918 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-25 08:49:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:47,926 INFO L225 Difference]: With dead ends: 62 [2019-11-25 08:49:47,926 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:49:47,929 INFO L630 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 [2019-11-25 08:49:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:49:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-25 08:49:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:49:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-25 08:49:47,959 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-25 08:49:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:47,960 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-25 08:49:47,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:49:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-25 08:49:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:49:47,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:47,961 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:48,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-25 08:49:48,164 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-25 08:49:48,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:48,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521040434] [2019-11-25 08:49:48,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:48,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:49:48,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:48,250 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:48,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521040434] [2019-11-25 08:49:48,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:48,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:49:48,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788443853] [2019-11-25 08:49:48,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:49:48,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:49:48,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:49:48,281 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-11-25 08:49:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:48,428 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-25 08:49:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:48,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-25 08:49:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:48,432 INFO L225 Difference]: With dead ends: 68 [2019-11-25 08:49:48,432 INFO L226 Difference]: Without dead ends: 59 [2019-11-25 08:49:48,433 INFO L630 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 [2019-11-25 08:49:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-25 08:49:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-11-25 08:49:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:49:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-25 08:49:48,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-25 08:49:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:48,440 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-25 08:49:48,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:49:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-25 08:49:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:49:48,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:48,441 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:48,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-25 08:49:48,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-25 08:49:48,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:48,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424456097] [2019-11-25 08:49:48,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:48,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:49:48,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:48,752 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:48,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424456097] [2019-11-25 08:49:48,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:48,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-25 08:49:48,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372180566] [2019-11-25 08:49:48,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:49:48,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:49:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:48,791 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-25 08:49:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:48,842 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-11-25 08:49:48,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:49:48,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-25 08:49:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:48,844 INFO L225 Difference]: With dead ends: 52 [2019-11-25 08:49:48,844 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:49:48,844 INFO L630 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 [2019-11-25 08:49:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:49:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:49:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:49:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-25 08:49:48,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-25 08:49:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:48,849 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-25 08:49:48,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:49:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-25 08:49:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:49:48,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:48,850 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:49,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-25 08:49:49,063 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-11-25 08:49:49,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:49,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195893196] [2019-11-25 08:49:49,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:49,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:49:49,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:49,140 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:49,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195893196] [2019-11-25 08:49:49,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:49,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:49:49,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387517615] [2019-11-25 08:49:49,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:49:49,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:49:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:49:49,161 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-25 08:49:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:49,258 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-25 08:49:49,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:49,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-25 08:49:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:49,263 INFO L225 Difference]: With dead ends: 61 [2019-11-25 08:49:49,263 INFO L226 Difference]: Without dead ends: 52 [2019-11-25 08:49:49,263 INFO L630 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 [2019-11-25 08:49:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-25 08:49:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-11-25 08:49:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:49:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-25 08:49:49,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-25 08:49:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:49,277 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-25 08:49:49,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:49:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-25 08:49:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:49:49,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:49,281 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:49,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-25 08:49:49,495 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-11-25 08:49:49,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:49,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398431976] [2019-11-25 08:49:49,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:49,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:49,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:49,594 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:49,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398431976] [2019-11-25 08:49:49,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:49,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:49:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883856174] [2019-11-25 08:49:49,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:49:49,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:49:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:49,616 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-25 08:49:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:49,627 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-25 08:49:49,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:49:49,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-25 08:49:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:49,629 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:49:49,629 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:49:49,629 INFO L630 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 [2019-11-25 08:49:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:49:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-25 08:49:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:49:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-25 08:49:49,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-25 08:49:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:49,635 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-25 08:49:49,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:49:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-25 08:49:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:49:49,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:49,639 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:49,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-25 08:49:49,840 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-11-25 08:49:49,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:49,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410508962] [2019-11-25 08:49:49,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:49,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:49:49,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:49,954 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:49,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:49:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:50,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410508962] [2019-11-25 08:49:50,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:50,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-25 08:49:50,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383517473] [2019-11-25 08:49:50,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:49:50,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:49:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:49:50,009 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-11-25 08:49:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:50,130 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-25 08:49:50,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:49:50,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-25 08:49:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:50,132 INFO L225 Difference]: With dead ends: 40 [2019-11-25 08:49:50,132 INFO L226 Difference]: Without dead ends: 37 [2019-11-25 08:49:50,132 INFO L630 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 [2019-11-25 08:49:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-25 08:49:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-25 08:49:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:49:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-25 08:49:50,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-11-25 08:49:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:50,137 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-25 08:49:50,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:49:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-25 08:49:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:49:50,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:50,138 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:50,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-11-25 08:49:50,354 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-11-25 08:49:50,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:50,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40117029] [2019-11-25 08:49:50,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:50,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:49:50,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:50,464 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:50,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40117029] [2019-11-25 08:49:50,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:50,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-25 08:49:50,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999691845] [2019-11-25 08:49:50,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:49:50,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:50,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:49:50,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:49:50,494 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-25 08:49:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:50,548 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-25 08:49:50,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:49:50,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-25 08:49:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:50,550 INFO L225 Difference]: With dead ends: 43 [2019-11-25 08:49:50,550 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:49:50,550 INFO L630 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 [2019-11-25 08:49:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:49:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:49:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:49:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-11-25 08:49:50,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-11-25 08:49:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:50,555 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-11-25 08:49:50,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:49:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-11-25 08:49:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:49:50,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:50,556 INFO L410 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] [2019-11-25 08:49:50,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-11-25 08:49:50,772 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-11-25 08:49:50,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:50,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548633961] [2019-11-25 08:49:50,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/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 [2019-11-25 08:49:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:50,965 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:49:50,965 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:49:51,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-11-25 08:49:51,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:49:51 BoogieIcfgContainer [2019-11-25 08:49:51,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:49:51,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:49:51,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:49:51,216 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:49:51,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:47" (3/4) ... [2019-11-25 08:49:51,218 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:49:51,289 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dedb4e0e-279c-437a-8eee-1116ab5bd527/bin/uautomizer/witness.graphml [2019-11-25 08:49:51,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:49:51,291 INFO L168 Benchmark]: Toolchain (without parser) took 4553.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.3 MB). Free memory was 963.1 MB in the beginning and 947.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 195.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:51,291 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:51,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.16 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 952.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:51,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.3 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:51,292 INFO L168 Benchmark]: Boogie Preprocessor took 63.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:51,293 INFO L168 Benchmark]: RCFGBuilder took 419.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:51,293 INFO L168 Benchmark]: TraceAbstraction took 3515.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 947.0 MB in the end (delta: 195.4 MB). Peak memory consumption was 195.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:51,293 INFO L168 Benchmark]: Witness Printer took 73.28 ms. Allocated memory is still 1.2 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:51,296 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 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 329.16 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 952.4 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 145.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.3 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 63.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 419.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3515.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 947.0 MB in the end (delta: 195.4 MB). Peak memory consumption was 195.4 MB. Max. memory is 11.5 GB. * Witness Printer took 73.28 ms. Allocated memory is still 1.2 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 79]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L44] COND FALSE !(__fpclassify_float(x) == 0) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L48] COND FALSE !(__fpclassify_float(y) == 0) [L51] EXPR x > y ? x : y [L51] return x > y ? x : y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L55] __uint32_t w; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (w) = gf_u.word [L63] return (w & 0x80000000) != 0; [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s 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, 7943 SizeOfPredicates, 27 NumberOfNonLiveVariables, 328 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...