./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/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 064927d7c1e3d8158c8524deee46f65d988c7936 ..................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/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 064927d7c1e3d8158c8524deee46f65d988c7936 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:59:06,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:06,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:07,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:07,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:07,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:07,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:07,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:07,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:07,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:07,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:07,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:07,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:07,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:07,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:07,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:07,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:07,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:07,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:07,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:07,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:07,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:07,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:07,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:07,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:07,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:07,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:07,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:07,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:07,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:07,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:07,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:07,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:07,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:07,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:07,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:07,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:07,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:07,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:07,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:07,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:07,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:59:07,058 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:07,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:07,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:07,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:07,059 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:07,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:07,060 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:07,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:59:07,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:07,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:07,061 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:07,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:07,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:07,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:07,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:07,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:07,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:07,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:07,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:07,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:07,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:59:07,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:59:07,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:07,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/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 -> 064927d7c1e3d8158c8524deee46f65d988c7936 [2019-10-22 08:59:07,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:07,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:07,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:07,105 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:07,106 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:07,106 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2019-10-22 08:59:07,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/f3887ac23/8383e84dda514f38adda9fd3cac97ad2/FLAG96fef1a4b [2019-10-22 08:59:07,541 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:07,542 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2019-10-22 08:59:07,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/f3887ac23/8383e84dda514f38adda9fd3cac97ad2/FLAG96fef1a4b [2019-10-22 08:59:07,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/f3887ac23/8383e84dda514f38adda9fd3cac97ad2 [2019-10-22 08:59:07,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:07,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:07,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:07,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:07,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:07,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c01b3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07, skipping insertion in model container [2019-10-22 08:59:07,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,575 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:07,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:07,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:07,803 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:07,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:07,920 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:07,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07 WrapperNode [2019-10-22 08:59:07,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:07,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:07,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:07,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:07,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:07,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:07,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:07,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:07,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:07,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:08,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:08,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... [2019-10-22 08:59:08,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:08,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:08,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:08,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:08,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:08,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:59:08,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-22 08:59:08,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:08,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:08,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:59:08,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:59:08,338 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:08,339 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:59:08,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:08 BoogieIcfgContainer [2019-10-22 08:59:08,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:08,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:08,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:08,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:08,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:07" (1/3) ... [2019-10-22 08:59:08,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d26108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:08, skipping insertion in model container [2019-10-22 08:59:08,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:07" (2/3) ... [2019-10-22 08:59:08,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d26108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:08, skipping insertion in model container [2019-10-22 08:59:08,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:08" (3/3) ... [2019-10-22 08:59:08,347 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2019-10-22 08:59:08,356 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:08,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:59:08,374 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:59:08,397 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:08,397 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:08,397 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:08,397 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:08,398 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:08,398 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:08,398 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:08,398 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 08:59:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:59:08,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:08,419 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:08,421 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 08:59:08,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:08,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585683828] [2019-10-22 08:59:08,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:08,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585683828] [2019-10-22 08:59:08,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:08,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:59:08,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685060823] [2019-10-22 08:59:08,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:59:08,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:59:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:59:08,617 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 08:59:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:08,635 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 08:59:08,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:59:08,637 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 08:59:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:08,647 INFO L225 Difference]: With dead ends: 62 [2019-10-22 08:59:08,647 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:59:08,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:59:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:59:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:59:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:59:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 08:59:08,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 08:59:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:08,682 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 08:59:08,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:59:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 08:59:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:59:08,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:08,683 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:08,683 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 08:59:08,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:08,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696732000] [2019-10-22 08:59:08,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:08,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696732000] [2019-10-22 08:59:08,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:08,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:59:08,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085602513] [2019-10-22 08:59:08,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:08,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:08,767 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-10-22 08:59:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:08,845 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-10-22 08:59:08,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:08,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 08:59:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:08,846 INFO L225 Difference]: With dead ends: 53 [2019-10-22 08:59:08,847 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:59:08,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:59:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-10-22 08:59:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:59:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:59:08,853 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 08:59:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:08,854 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:59:08,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:59:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:59:08,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:08,855 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:08,855 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-10-22 08:59:08,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:08,856 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235862045] [2019-10-22 08:59:08,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:08,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235862045] [2019-10-22 08:59:08,937 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:08,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:59:08,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708936009] [2019-10-22 08:59:08,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:08,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:08,939 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 08:59:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:08,986 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-22 08:59:08,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:08,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 08:59:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:08,988 INFO L225 Difference]: With dead ends: 55 [2019-10-22 08:59:08,988 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 08:59:08,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 08:59:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-10-22 08:59:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:59:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:59:08,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-10-22 08:59:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:08,994 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:59:08,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:59:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:59:08,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:08,995 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:08,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 08:59:08,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:08,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154256602] [2019-10-22 08:59:08,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:08,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:09,078 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:59:09,079 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:59:09,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:09 BoogieIcfgContainer [2019-10-22 08:59:09,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:09,106 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:09,106 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:09,106 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:09,107 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:08" (3/4) ... [2019-10-22 08:59:09,110 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:59:09,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:09,112 INFO L168 Benchmark]: Toolchain (without parser) took 1549.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 941.8 MB in the beginning and 1.0 GB in the end (delta: -106.7 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,112 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:09,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 941.8 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,114 INFO L168 Benchmark]: Boogie Preprocessor took 40.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,115 INFO L168 Benchmark]: RCFGBuilder took 330.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,115 INFO L168 Benchmark]: TraceAbstraction took 764.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:09,115 INFO L168 Benchmark]: Witness Printer took 4.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:09,119 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 358.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 941.8 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 330.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 764.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 11.5 GB. * Witness Printer took 4.34 ms. Allocated memory is still 1.2 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: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someUnaryDOUBLEoperation at line 74. Possible FailurePath: [L74] double x = -0.0; [L75] double y = 0.0; [L19] __uint32_t msw, lsw; [L22] ieee_double_shape_type ew_u; [L23] ew_u.value = (x) [L24] EXPR ew_u.parts.msw [L24] (msw) = ew_u.parts.msw [L25] EXPR ew_u.parts.lsw [L25] (lsw) = ew_u.parts.lsw [L28-L29] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L31-L32] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L34-L35] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L38-L39] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L42] return 0; [L46] COND TRUE __fpclassify_double(x) == 0 [L47] return y; [L76] double res = fmin_double(x, y); [L79] EXPR res == -0.0 && __signbit_double(res) == 1 [L79] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, 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, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 08:59:11,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:11,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:11,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:11,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:11,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:11,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:11,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:11,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:11,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:11,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:11,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:11,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:11,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:11,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:11,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:11,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:11,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:11,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:11,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:11,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:11,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:11,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:11,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:11,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:11,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:11,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:11,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:11,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:11,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:11,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:11,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:11,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:11,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:11,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:11,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:11,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:11,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:11,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:11,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:11,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:11,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:59:11,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:11,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:11,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:11,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:11,243 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:11,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:11,244 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:11,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:11,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:11,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:11,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:11,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:11,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:11,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:11,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:11,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:11,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:11,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:59:11,247 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/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 -> 064927d7c1e3d8158c8524deee46f65d988c7936 [2019-10-22 08:59:11,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:11,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:11,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:11,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:11,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:11,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2019-10-22 08:59:11,347 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/be70a5f86/111618af8ff04b27a99b44ebca3ee205/FLAGe6163dccd [2019-10-22 08:59:11,763 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:11,763 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2019-10-22 08:59:11,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/be70a5f86/111618af8ff04b27a99b44ebca3ee205/FLAGe6163dccd [2019-10-22 08:59:11,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/data/be70a5f86/111618af8ff04b27a99b44ebca3ee205 [2019-10-22 08:59:11,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:11,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:11,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:11,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:11,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:11,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:11" (1/1) ... [2019-10-22 08:59:11,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b4998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:11, skipping insertion in model container [2019-10-22 08:59:11,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:11" (1/1) ... [2019-10-22 08:59:11,811 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:11,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:12,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:12,026 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:12,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:12,166 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:12,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12 WrapperNode [2019-10-22 08:59:12,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:12,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:12,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:12,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:12,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:12,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:12,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:12,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:12,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... [2019-10-22 08:59:12,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:12,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:12,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:12,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:12,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-10-22 08:59:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:59:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 08:59:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:12,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:59:12,693 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:12,694 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:59:12,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:12 BoogieIcfgContainer [2019-10-22 08:59:12,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:12,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:12,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:12,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:12,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:11" (1/3) ... [2019-10-22 08:59:12,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44660982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:12, skipping insertion in model container [2019-10-22 08:59:12,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:12" (2/3) ... [2019-10-22 08:59:12,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44660982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:12, skipping insertion in model container [2019-10-22 08:59:12,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:12" (3/3) ... [2019-10-22 08:59:12,704 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2019-10-22 08:59:12,714 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:12,721 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:59:12,744 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:59:12,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:12,796 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:12,796 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:12,796 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:12,796 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:12,796 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:12,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:12,797 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 08:59:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:59:12,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:12,826 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:12,828 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 08:59:12,846 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:12,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027617631] [2019-10-22 08:59:12,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:12,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:59:12,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:12,960 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:12,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027617631] [2019-10-22 08:59:12,965 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:12,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:59:12,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850319863] [2019-10-22 08:59:12,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:59:12,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:59:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:59:12,986 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 08:59:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:13,005 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 08:59:13,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:59:13,007 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 08:59:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:13,018 INFO L225 Difference]: With dead ends: 62 [2019-10-22 08:59:13,018 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:59:13,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:59:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:59:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:59:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:59:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 08:59:13,061 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 08:59:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:13,061 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 08:59:13,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:59:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 08:59:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:59:13,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:13,062 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:13,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 08:59:13,263 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 08:59:13,264 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:13,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51043933] [2019-10-22 08:59:13,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:13,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:59:13,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:13,364 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:13,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51043933] [2019-10-22 08:59:13,385 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:13,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:59:13,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607251067] [2019-10-22 08:59:13,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:13,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:13,388 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-10-22 08:59:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:13,720 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-22 08:59:13,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:59:13,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-22 08:59:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:13,723 INFO L225 Difference]: With dead ends: 68 [2019-10-22 08:59:13,724 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:59:13,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:59:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:59:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-10-22 08:59:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:59:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:59:13,731 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 08:59:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:13,732 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:59:13,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:59:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:59:13,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:13,733 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:13,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 08:59:13,935 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 08:59:13,936 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:13,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044208153] [2019-10-22 08:59:13,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:14,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:59:14,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:14,088 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:14,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:59:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:14,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044208153] [2019-10-22 08:59:14,165 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:14,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:59:14,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024624153] [2019-10-22 08:59:14,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:14,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:14,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:14,167 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2019-10-22 08:59:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:14,290 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-10-22 08:59:14,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:14,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-22 08:59:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:14,292 INFO L225 Difference]: With dead ends: 52 [2019-10-22 08:59:14,292 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 08:59:14,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 08:59:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 08:59:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:59:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-10-22 08:59:14,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2019-10-22 08:59:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:14,298 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-10-22 08:59:14,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-10-22 08:59:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:59:14,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:14,299 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:14,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-10-22 08:59:14,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-10-22 08:59:14,501 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:14,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659669303] [2019-10-22 08:59:14,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:14,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:59:14,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:14,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:14,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659669303] [2019-10-22 08:59:14,663 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:14,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:59:14,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623017097] [2019-10-22 08:59:14,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:14,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:14,665 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2019-10-22 08:59:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:14,891 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-10-22 08:59:14,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:59:14,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 08:59:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:14,895 INFO L225 Difference]: With dead ends: 65 [2019-10-22 08:59:14,895 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:59:14,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:59:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:59:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2019-10-22 08:59:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:59:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-22 08:59:14,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2019-10-22 08:59:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:14,902 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-22 08:59:14,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-22 08:59:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:59:14,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:14,903 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:15,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-10-22 08:59:15,105 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-10-22 08:59:15,106 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:15,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365729519] [2019-10-22 08:59:15,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:15,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:59:15,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:15,235 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:15,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365729519] [2019-10-22 08:59:15,270 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:15,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:59:15,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17223541] [2019-10-22 08:59:15,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:15,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:15,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:15,271 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-10-22 08:59:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:15,283 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-22 08:59:15,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:59:15,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-22 08:59:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:15,284 INFO L225 Difference]: With dead ends: 40 [2019-10-22 08:59:15,284 INFO L226 Difference]: Without dead ends: 30 [2019-10-22 08:59:15,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-22 08:59:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-22 08:59:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:59:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-22 08:59:15,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2019-10-22 08:59:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:15,289 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-22 08:59:15,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-22 08:59:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:59:15,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:15,290 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:15,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-10-22 08:59:15,491 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-10-22 08:59:15,492 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:15,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497439961] [2019-10-22 08:59:15,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:15,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:59:15,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:15,660 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:15,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:59:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:15,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497439961] [2019-10-22 08:59:15,713 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:15,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 08:59:15,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579824123] [2019-10-22 08:59:15,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:59:15,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:59:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:15,715 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2019-10-22 08:59:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:15,850 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-22 08:59:15,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:59:15,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-22 08:59:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:15,851 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:59:15,851 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 08:59:15,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:59:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 08:59:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2019-10-22 08:59:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:59:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-22 08:59:15,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2019-10-22 08:59:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:15,857 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-22 08:59:15,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:59:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-22 08:59:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:59:15,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:15,858 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-10-22 08:59:16,059 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-10-22 08:59:16,060 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:16,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610739746] [2019-10-22 08:59:16,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:59:16,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:16,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:16,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610739746] [2019-10-22 08:59:16,278 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:16,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 08:59:16,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855017653] [2019-10-22 08:59:16,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:59:16,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:16,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:59:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:59:16,280 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-10-22 08:59:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:16,374 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-22 08:59:16,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:16,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-10-22 08:59:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:16,385 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:59:16,386 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 08:59:16,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:59:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 08:59:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-22 08:59:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 08:59:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-22 08:59:16,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2019-10-22 08:59:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:16,392 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-22 08:59:16,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:59:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-22 08:59:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:59:16,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:16,394 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-10-22 08:59:16,594 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-10-22 08:59:16,595 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:16,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059751539] [2019-10-22 08:59:16,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-10-22 08:59:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:16,919 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-10-22 08:59:16,919 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:59:17,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-10-22 08:59:17,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:17 BoogieIcfgContainer [2019-10-22 08:59:17,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:17,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:17,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:17,167 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:17,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:12" (3/4) ... [2019-10-22 08:59:17,170 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:59:17,218 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_367f1eb9-48ef-4564-bdb0-99d7e476c617/bin/uautomizer/witness.graphml [2019-10-22 08:59:17,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:17,221 INFO L168 Benchmark]: Toolchain (without parser) took 5426.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 952.3 MB in the beginning and 871.6 MB in the end (delta: 80.7 MB). Peak memory consumption was 212.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,221 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:17,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,223 INFO L168 Benchmark]: Boogie Preprocessor took 35.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,223 INFO L168 Benchmark]: RCFGBuilder took 441.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,223 INFO L168 Benchmark]: TraceAbstraction took 4470.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 878.5 MB in the end (delta: 211.7 MB). Peak memory consumption was 211.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,224 INFO L168 Benchmark]: Witness Printer took 51.90 ms. Allocated memory is still 1.2 GB. Free memory was 878.5 MB in the beginning and 871.6 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,226 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 372.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 50.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 441.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4470.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 878.5 MB in the end (delta: 211.7 MB). Peak memory consumption was 211.7 MB. Max. memory is 11.5 GB. * Witness Printer took 51.90 ms. Allocated memory is still 1.2 GB. Free memory was 878.5 MB in the beginning and 871.6 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 80]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] double x = -0.0; [L75] double y = 0.0; [L19] __uint32_t msw, lsw; [L22] ieee_double_shape_type ew_u; [L23] ew_u.value = (x) [L24] EXPR ew_u.parts.msw [L24] (msw) = ew_u.parts.msw [L25] EXPR ew_u.parts.lsw [L25] (lsw) = ew_u.parts.lsw [L28-L29] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L30] return 2; [L46] COND FALSE !(__fpclassify_double(x) == 0) [L19] __uint32_t msw, lsw; [L22] ieee_double_shape_type ew_u; [L23] ew_u.value = (x) [L24] EXPR ew_u.parts.msw [L24] (msw) = ew_u.parts.msw [L25] EXPR ew_u.parts.lsw [L25] (lsw) = ew_u.parts.lsw [L28-L29] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L30] return 2; [L48] COND FALSE !(__fpclassify_double(y) == 0) [L51] EXPR x < y ? x : y [L51] return x < y ? x : y; [L76] double res = fmin_double(x, y); [L79] EXPR res == -0.0 && __signbit_double(res) == 1 [L55] __uint32_t msw; [L58] ieee_double_shape_type gh_u; [L59] gh_u.value = (x) [L60] EXPR gh_u.parts.msw [L60] (msw) = gh_u.parts.msw [L63] return (msw & 0x80000000) != 0; [L79] EXPR res == -0.0 && __signbit_double(res) == 1 [L79] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 290 SDslu, 362 SDs, 0 SdLazy, 112 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s 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, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 10764 SizeOfPredicates, 27 NumberOfNonLiveVariables, 374 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...