./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f ......................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-29 20:48:10,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:48:10,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:48:10,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:48:10,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:48:10,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:48:10,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:48:10,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:48:10,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:48:10,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:48:10,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:48:10,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:48:10,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:48:10,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:48:10,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:48:10,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:48:10,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:48:10,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:48:10,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:48:10,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:48:10,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:48:10,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:48:10,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:48:10,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:48:10,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:48:10,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:48:10,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:48:10,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:48:10,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:48:10,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:48:10,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:48:10,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:48:10,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:48:10,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:48:10,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:48:10,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:48:10,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:48:10,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:48:10,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:48:10,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:48:10,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:48:10,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:48:10,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:48:10,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:48:10,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:48:10,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:48:10,239 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:48:10,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:48:10,240 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:48:10,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:48:10,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:48:10,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:48:10,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:48:10,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:48:10,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:48:10,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:48:10,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:48:10,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:48:10,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:48:10,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:48:10,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:48:10,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:48:10,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:48:10,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:48:10,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:48:10,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:48:10,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:48:10,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:48:10,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:48:10,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:48:10,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:48:10,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-29 20:48:10,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:48:10,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:48:10,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:48:10,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:48:10,506 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:48:10,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-29 20:48:10,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/1b4f1d20d/6e47fd904c1c4d0caf9e360a2e735eff/FLAG8b1167d50 [2020-11-29 20:48:11,143 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:48:11,144 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-29 20:48:11,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/1b4f1d20d/6e47fd904c1c4d0caf9e360a2e735eff/FLAG8b1167d50 [2020-11-29 20:48:11,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/1b4f1d20d/6e47fd904c1c4d0caf9e360a2e735eff [2020-11-29 20:48:11,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:48:11,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:48:11,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:11,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:48:11,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:48:11,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ced2191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11, skipping insertion in model container [2020-11-29 20:48:11,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:48:11,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:48:11,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:11,781 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:48:11,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:11,856 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:48:11,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11 WrapperNode [2020-11-29 20:48:11,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:11,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:11,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:48:11,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:48:11,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:11,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:48:11,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:48:11,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:48:11,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... [2020-11-29 20:48:11,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:48:11,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:48:11,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:48:11,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:48:11,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/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 [2020-11-29 20:48:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:48:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:48:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 20:48:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:48:12,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:48:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:48:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:48:12,493 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:48:12,493 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-29 20:48:12,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:12 BoogieIcfgContainer [2020-11-29 20:48:12,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:48:12,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:48:12,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:48:12,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:48:12,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:48:11" (1/3) ... [2020-11-29 20:48:12,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328eebb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:12, skipping insertion in model container [2020-11-29 20:48:12,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:11" (2/3) ... [2020-11-29 20:48:12,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328eebb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:12, skipping insertion in model container [2020-11-29 20:48:12,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:12" (3/3) ... [2020-11-29 20:48:12,502 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-29 20:48:12,513 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:48:12,518 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:48:12,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:48:12,554 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:48:12,554 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:48:12,554 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:48:12,554 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:48:12,554 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:48:12,554 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:48:12,554 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:48:12,555 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:48:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-29 20:48:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:48:12,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:12,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:12,574 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-29 20:48:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:12,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657266320] [2020-11-29 20:48:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657266320] [2020-11-29 20:48:12,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:12,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:48:12,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507772422] [2020-11-29 20:48:12,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:48:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:12,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:48:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:48:12,775 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-29 20:48:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:12,797 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-29 20:48:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:48:12,798 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-29 20:48:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:12,815 INFO L225 Difference]: With dead ends: 57 [2020-11-29 20:48:12,815 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 20:48:12,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:48:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 20:48:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 20:48:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 20:48:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-29 20:48:12,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-29 20:48:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:12,863 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-29 20:48:12,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:48:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-29 20:48:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:48:12,864 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:12,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:12,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:48:12,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:12,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-29 20:48:12,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:12,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746746985] [2020-11-29 20:48:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:13,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746746985] [2020-11-29 20:48:13,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:13,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:48:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262040708] [2020-11-29 20:48:13,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:48:13,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:48:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:48:13,048 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-11-29 20:48:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:13,124 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-11-29 20:48:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:48:13,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 20:48:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:13,126 INFO L225 Difference]: With dead ends: 40 [2020-11-29 20:48:13,126 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 20:48:13,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:48:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 20:48:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-11-29 20:48:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:48:13,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-29 20:48:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:13,133 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:48:13,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:48:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:48:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:48:13,134 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:13,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:13,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:48:13,135 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:13,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-11-29 20:48:13,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:13,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108588931] [2020-11-29 20:48:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108588931] [2020-11-29 20:48:13,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:13,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:48:13,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444675117] [2020-11-29 20:48:13,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:48:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:48:13,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:48:13,213 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-29 20:48:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:13,271 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-29 20:48:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:48:13,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 20:48:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:13,273 INFO L225 Difference]: With dead ends: 42 [2020-11-29 20:48:13,273 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 20:48:13,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:48:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 20:48:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-29 20:48:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:48:13,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-11-29 20:48:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:13,280 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:48:13,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:48:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:48:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:48:13,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:13,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:13,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:48:13,281 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-11-29 20:48:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:13,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522293841] [2020-11-29 20:48:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:13,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522293841] [2020-11-29 20:48:13,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:13,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:48:13,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020582976] [2020-11-29 20:48:13,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:48:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:48:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:48:13,362 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-29 20:48:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:13,440 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-11-29 20:48:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:48:13,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 20:48:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:13,444 INFO L225 Difference]: With dead ends: 44 [2020-11-29 20:48:13,445 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 20:48:13,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:48:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 20:48:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-11-29 20:48:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:48:13,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-11-29 20:48:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:13,451 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:48:13,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:48:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:48:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:48:13,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:13,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:13,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:48:13,452 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-11-29 20:48:13,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:13,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226971605] [2020-11-29 20:48:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:13,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226971605] [2020-11-29 20:48:13,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:13,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:48:13,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250126351] [2020-11-29 20:48:13,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:48:13,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:13,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:48:13,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:48:13,508 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-29 20:48:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:13,589 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-29 20:48:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:48:13,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-29 20:48:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:13,592 INFO L225 Difference]: With dead ends: 42 [2020-11-29 20:48:13,592 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 20:48:13,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:48:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 20:48:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-29 20:48:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:48:13,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-11-29 20:48:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:13,603 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:48:13,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:48:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:48:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:48:13,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:13,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:13,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:48:13,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-29 20:48:13,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:13,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237884789] [2020-11-29 20:48:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:13,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:13,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:13,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:48:13,741 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:48:13,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:48:13,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:48:13 BoogieIcfgContainer [2020-11-29 20:48:13,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:48:13,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:48:13,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:48:13,787 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:48:13,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:12" (3/4) ... [2020-11-29 20:48:13,791 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:48:13,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:48:13,794 INFO L168 Benchmark]: Toolchain (without parser) took 2284.14 ms. Allocated memory is still 98.6 MB. Free memory was 67.4 MB in the beginning and 72.6 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:13,795 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:13,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.31 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 75.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:13,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.23 ms. Allocated memory is still 98.6 MB. Free memory was 75.2 MB in the beginning and 73.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:13,806 INFO L168 Benchmark]: Boogie Preprocessor took 29.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 72.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:13,807 INFO L168 Benchmark]: RCFGBuilder took 549.45 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 52.7 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:13,808 INFO L168 Benchmark]: TraceAbstraction took 1290.19 ms. Allocated memory is still 98.6 MB. Free memory was 52.2 MB in the beginning and 73.4 MB in the end (delta: -21.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:13,811 INFO L168 Benchmark]: Witness Printer took 4.47 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 72.6 MB in the end (delta: 758.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:13,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 346.31 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 75.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.23 ms. Allocated memory is still 98.6 MB. Free memory was 75.2 MB in the beginning and 73.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 72.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 549.45 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 52.7 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1290.19 ms. Allocated memory is still 98.6 MB. Free memory was 52.2 MB in the beginning and 73.4 MB in the end (delta: -21.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.47 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 72.6 MB in the end (delta: 758.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someBinaryArithmeticDOUBLEoperation at line 67. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:48:16,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:48:16,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:48:16,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:48:16,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:48:16,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:48:16,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:48:16,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:48:16,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:48:16,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:48:16,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:48:16,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:48:16,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:48:16,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:48:16,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:48:16,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:48:16,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:48:16,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:48:16,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:48:16,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:48:16,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:48:16,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:48:16,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:48:16,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:48:16,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:48:16,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:48:16,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:48:16,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:48:16,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:48:16,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:48:16,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:48:16,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:48:16,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:48:16,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:48:16,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:48:16,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:48:16,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:48:16,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:48:16,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:48:16,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:48:16,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:48:16,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 20:48:16,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:48:16,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:48:16,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:48:16,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:48:16,477 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:48:16,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:48:16,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:48:16,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:48:16,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:48:16,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:48:16,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:48:16,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:48:16,479 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 20:48:16,480 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 20:48:16,480 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:48:16,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:48:16,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:48:16,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:48:16,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:48:16,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:48:16,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:48:16,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:48:16,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:48:16,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:48:16,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:48:16,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:48:16,483 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 20:48:16,483 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 20:48:16,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:48:16,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:48:16,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 20:48:16,484 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-29 20:48:16,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:48:16,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:48:16,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:48:16,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:48:16,969 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:48:16,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-29 20:48:17,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/5034defdd/b5d73e3251c04ab59bac058bb3a6ca5c/FLAG2a7e77135 [2020-11-29 20:48:17,584 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:48:17,585 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-29 20:48:17,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/5034defdd/b5d73e3251c04ab59bac058bb3a6ca5c/FLAG2a7e77135 [2020-11-29 20:48:17,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/data/5034defdd/b5d73e3251c04ab59bac058bb3a6ca5c [2020-11-29 20:48:17,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:48:17,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:48:17,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:17,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:48:17,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:48:17,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:17" (1/1) ... [2020-11-29 20:48:17,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ef9821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:17, skipping insertion in model container [2020-11-29 20:48:17,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:17" (1/1) ... [2020-11-29 20:48:17,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:48:17,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:48:18,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:18,161 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:48:18,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:18,208 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:48:18,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18 WrapperNode [2020-11-29 20:48:18,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:18,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:18,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:48:18,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:48:18,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:18,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:48:18,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:48:18,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:48:18,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... [2020-11-29 20:48:18,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:48:18,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:48:18,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:48:18,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:48:18,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/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 [2020-11-29 20:48:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-29 20:48:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 20:48:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:48:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 20:48:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:48:18,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:48:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:48:19,129 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:48:19,129 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-29 20:48:19,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:19 BoogieIcfgContainer [2020-11-29 20:48:19,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:48:19,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:48:19,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:48:19,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:48:19,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:48:17" (1/3) ... [2020-11-29 20:48:19,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cd944a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:19, skipping insertion in model container [2020-11-29 20:48:19,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:18" (2/3) ... [2020-11-29 20:48:19,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cd944a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:19, skipping insertion in model container [2020-11-29 20:48:19,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:19" (3/3) ... [2020-11-29 20:48:19,149 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-29 20:48:19,160 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:48:19,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:48:19,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:48:19,215 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:48:19,215 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:48:19,215 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:48:19,215 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:48:19,215 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:48:19,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:48:19,216 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:48:19,216 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:48:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-29 20:48:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:48:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:19,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:19,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-29 20:48:19,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:48:19,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172981563] [2020-11-29 20:48:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/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 [2020-11-29 20:48:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 20:48:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:48:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:19,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:48:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172981563] [2020-11-29 20:48:19,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:19,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 20:48:19,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389397498] [2020-11-29 20:48:19,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:48:19,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:48:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:48:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:48:19,446 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-29 20:48:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:19,466 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-29 20:48:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:48:19,467 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-29 20:48:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:19,476 INFO L225 Difference]: With dead ends: 57 [2020-11-29 20:48:19,476 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 20:48:19,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:48:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 20:48:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 20:48:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 20:48:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-29 20:48:19,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-29 20:48:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:19,511 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-29 20:48:19,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:48:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-29 20:48:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:48:19,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:19,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:19,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 20:48:19,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-29 20:48:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:48:19,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436858047] [2020-11-29 20:48:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/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 [2020-11-29 20:48:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:48:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:48:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:19,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:48:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:48:19,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436858047] [2020-11-29 20:48:19,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:19,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 20:48:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139876057] [2020-11-29 20:48:19,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:48:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:48:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:48:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:48:19,936 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-11-29 20:48:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:20,084 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-11-29 20:48:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:48:20,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 20:48:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:20,088 INFO L225 Difference]: With dead ends: 50 [2020-11-29 20:48:20,088 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 20:48:20,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:48:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 20:48:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-11-29 20:48:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-29 20:48:20,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-29 20:48:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:20,105 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-29 20:48:20,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:48:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-29 20:48:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:48:20,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:20,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:48:20,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 20:48:20,327 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-29 20:48:20,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:48:20,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683958896] [2020-11-29 20:48:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/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 [2020-11-29 20:48:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:20,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:20,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:20,719 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 20:48:20,724 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:48:20,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 20:48:20,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:48:20 BoogieIcfgContainer [2020-11-29 20:48:20,955 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:48:20,956 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:48:20,956 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:48:20,956 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:48:20,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:19" (3/4) ... [2020-11-29 20:48:20,959 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:48:21,019 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_05254569-4d69-4eda-ace6-14e6610ab588/bin/uautomizer/witness.graphml [2020-11-29 20:48:21,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:48:21,027 INFO L168 Benchmark]: Toolchain (without parser) took 3065.61 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 52.2 MB in the beginning and 65.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,029 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:21,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.70 ms. Allocated memory is still 75.5 MB. Free memory was 52.0 MB in the beginning and 41.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.42 ms. Allocated memory is still 75.5 MB. Free memory was 41.0 MB in the beginning and 58.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,033 INFO L168 Benchmark]: Boogie Preprocessor took 57.54 ms. Allocated memory is still 75.5 MB. Free memory was 58.2 MB in the beginning and 56.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:21,033 INFO L168 Benchmark]: RCFGBuilder took 760.99 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 36.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,034 INFO L168 Benchmark]: TraceAbstraction took 1813.42 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 57.6 MB in the beginning and 68.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,034 INFO L168 Benchmark]: Witness Printer took 67.14 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 65.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:21,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.70 ms. Allocated memory is still 75.5 MB. Free memory was 52.0 MB in the beginning and 41.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.42 ms. Allocated memory is still 75.5 MB. Free memory was 41.0 MB in the beginning and 58.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.54 ms. Allocated memory is still 75.5 MB. Free memory was 58.2 MB in the beginning and 56.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 760.99 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 36.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1813.42 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 57.6 MB in the beginning and 68.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Witness Printer took 67.14 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 65.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...