./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_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:15,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:15,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:15,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:15,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:15,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:15,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:15,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:15,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:15,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:15,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:15,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:15,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:15,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:15,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:15,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:15,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:15,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:15,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:15,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:15,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:15,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:15,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:15,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:15,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:15,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:15,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:15,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:15,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:15,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:15,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:15,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:15,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:15,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:15,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:15,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:15,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:15,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:15,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:15,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:15,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:15,254 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:21:15,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:15,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:15,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:15,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:15,306 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:15,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:15,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:15,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:21:15,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:15,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:15,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:21:15,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:15,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:21:15,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:15,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:21:15,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:15,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:21:15,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:15,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:15,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:15,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:15,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:15,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:15,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:15,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:21:15,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:21:15,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:21:15,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:21:15,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:15,315 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_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-28 03:21:15,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:15,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:15,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:15,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:15,660 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:15,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-28 03:21:15,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/dd2d2542a/225da9984efc46dbbceca6b345b92956/FLAGa382d6fac [2020-11-28 03:21:16,382 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:16,383 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-28 03:21:16,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/dd2d2542a/225da9984efc46dbbceca6b345b92956/FLAGa382d6fac [2020-11-28 03:21:16,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/dd2d2542a/225da9984efc46dbbceca6b345b92956 [2020-11-28 03:21:16,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:16,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:21:16,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:16,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:16,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:16,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:16" (1/1) ... [2020-11-28 03:21:16,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d7a5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:16, skipping insertion in model container [2020-11-28 03:21:16,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:16" (1/1) ... [2020-11-28 03:21:16,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:16,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:16,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:16,988 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:17,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:17,040 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:17,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17 WrapperNode [2020-11-28 03:21:17,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:17,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:17,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:21:17,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:21:17,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:17,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:17,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:17,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:17,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... [2020-11-28 03:21:17,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:17,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:17,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:17,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:17,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:21:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-28 03:21:17,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:17,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:17,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:21:17,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:21:17,749 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:17,749 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-28 03:21:17,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:17 BoogieIcfgContainer [2020-11-28 03:21:17,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:17,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:17,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:17,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:17,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:16" (1/3) ... [2020-11-28 03:21:17,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44bbe2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:17, skipping insertion in model container [2020-11-28 03:21:17,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:17" (2/3) ... [2020-11-28 03:21:17,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44bbe2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:17, skipping insertion in model container [2020-11-28 03:21:17,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:17" (3/3) ... [2020-11-28 03:21:17,781 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-28 03:21:17,792 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:17,797 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:21:17,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:21:17,837 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:17,837 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:21:17,837 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:17,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:17,838 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:17,838 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:17,838 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:17,838 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-28 03:21:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:21:17,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:17,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:17,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:17,869 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-28 03:21:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629797755] [2020-11-28 03:21:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:18,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629797755] [2020-11-28 03:21:18,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:18,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:21:18,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679992446] [2020-11-28 03:21:18,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:21:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:21:18,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:21:18,095 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-28 03:21:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:18,116 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-28 03:21:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:21:18,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-28 03:21:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:18,128 INFO L225 Difference]: With dead ends: 57 [2020-11-28 03:21:18,128 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:21:18,131 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 [2020-11-28 03:21:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:21:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-28 03:21:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 03:21:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-28 03:21:18,179 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-28 03:21:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:18,181 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-28 03:21:18,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:21:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-28 03:21:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:21:18,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:18,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:21:18,185 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-28 03:21:18,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137231198] [2020-11-28 03:21:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137231198] [2020-11-28 03:21:18,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:18,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653848430] [2020-11-28 03:21:18,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:18,419 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-11-28 03:21:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:18,577 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-11-28 03:21:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:18,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:21:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:18,580 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:21:18,580 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:21:18,581 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 [2020-11-28 03:21:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:21:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-11-28 03:21:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:21:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 03:21:18,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-28 03:21:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:18,592 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 03:21:18,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 03:21:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:21:18,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:18,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:21:18,597 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-11-28 03:21:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641249835] [2020-11-28 03:21:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:18,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641249835] [2020-11-28 03:21:18,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:18,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523960970] [2020-11-28 03:21:18,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:18,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:18,734 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-28 03:21:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:18,813 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-28 03:21:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:18,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-28 03:21:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:18,817 INFO L225 Difference]: With dead ends: 42 [2020-11-28 03:21:18,817 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 03:21:18,817 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 [2020-11-28 03:21:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 03:21:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-28 03:21:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:21:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 03:21:18,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-11-28 03:21:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:18,824 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 03:21:18,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 03:21:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:21:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:18,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:21:18,825 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-11-28 03:21:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384909104] [2020-11-28 03:21:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384909104] [2020-11-28 03:21:18,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:18,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373034146] [2020-11-28 03:21:18,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:18,886 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-28 03:21:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:18,959 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-11-28 03:21:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:18,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-28 03:21:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:18,960 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:21:18,960 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:21:18,961 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 [2020-11-28 03:21:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:21:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-11-28 03:21:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:21:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 03:21:18,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-11-28 03:21:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:18,967 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 03:21:18,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 03:21:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:21:18,968 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:18,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:21:18,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-11-28 03:21:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:18,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275721048] [2020-11-28 03:21:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275721048] [2020-11-28 03:21:19,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:19,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:19,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39749174] [2020-11-28 03:21:19,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:19,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:19,027 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-28 03:21:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:19,088 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-28 03:21:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:19,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:21:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:19,090 INFO L225 Difference]: With dead ends: 42 [2020-11-28 03:21:19,090 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 03:21:19,090 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 [2020-11-28 03:21:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 03:21:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-28 03:21:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:21:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 03:21:19,095 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-11-28 03:21:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:19,095 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 03:21:19,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 03:21:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:21:19,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:19,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:21:19,097 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-28 03:21:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:19,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787028697] [2020-11-28 03:21:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:21:19,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:21:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:21:19,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:21:19,166 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:21:19,166 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:21:19,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:21:19,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:19 BoogieIcfgContainer [2020-11-28 03:21:19,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:19,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:19,202 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:19,203 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:19,203 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:17" (3/4) ... [2020-11-28 03:21:19,214 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:21:19,214 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:19,216 INFO L168 Benchmark]: Toolchain (without parser) took 2493.82 ms. Allocated memory is still 100.7 MB. Free memory was 68.8 MB in the beginning and 77.2 MB in the end (delta: -8.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:19,217 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 33.1 MB in the beginning and 33.1 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:19,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.69 ms. Allocated memory is still 100.7 MB. Free memory was 68.6 MB in the beginning and 77.0 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:19,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.19 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:19,219 INFO L168 Benchmark]: Boogie Preprocessor took 60.60 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:19,219 INFO L168 Benchmark]: RCFGBuilder took 595.08 ms. Allocated memory is still 100.7 MB. Free memory was 73.9 MB in the beginning and 54.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:19,220 INFO L168 Benchmark]: TraceAbstraction took 1441.07 ms. Allocated memory is still 100.7 MB. Free memory was 54.0 MB in the beginning and 77.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:19,221 INFO L168 Benchmark]: Witness Printer took 12.08 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:19,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 33.1 MB in the beginning and 33.1 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.69 ms. Allocated memory is still 100.7 MB. Free memory was 68.6 MB in the beginning and 77.0 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.19 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.60 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 595.08 ms. Allocated memory is still 100.7 MB. Free memory was 73.9 MB in the beginning and 54.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1441.07 ms. Allocated memory is still 100.7 MB. Free memory was 54.0 MB in the beginning and 77.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * Witness Printer took 12.08 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. 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: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, 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, 0.3s 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 [2020-11-28 03:21:21,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:21,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:21,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:21,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:21,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:21,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:21,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:21,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:21,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:21,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:21,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:21,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:21,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:21,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:21,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:21,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:21,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:21,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:21,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:21,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:21,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:21,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:21,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:21,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:21,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:21,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:21,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:21,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:21,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:21,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:21,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:21,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:21,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:21,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:21,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:21,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:21,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:21,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:21,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:21,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:21,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-28 03:21:21,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:21,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:21,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:21,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:21,888 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:21,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:21,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:21,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:21,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:21,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:21:21,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:21,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:21:21,891 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 03:21:21,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 03:21:21,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:21,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:21:21,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:21,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:21:21,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:21,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:21,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:21,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:21,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:21,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:21,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:21,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:21:21,894 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-28 03:21:21,894 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 03:21:21,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:21:21,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:21,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 03:21:21,895 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_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-28 03:21:22,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:22,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:22,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:22,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:22,333 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:22,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-28 03:21:22,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/d3daf95ea/ee553f82473a4659af910590c85e0646/FLAG33363d165 [2020-11-28 03:21:22,955 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:22,956 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-11-28 03:21:22,968 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/d3daf95ea/ee553f82473a4659af910590c85e0646/FLAG33363d165 [2020-11-28 03:21:23,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/data/d3daf95ea/ee553f82473a4659af910590c85e0646 [2020-11-28 03:21:23,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:23,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:21:23,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:23,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:23,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:23,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c394bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23, skipping insertion in model container [2020-11-28 03:21:23,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:23,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:23,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:23,523 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:23,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:23,567 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:23,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23 WrapperNode [2020-11-28 03:21:23,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:23,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:23,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:21:23,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:21:23,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:23,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:23,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:23,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:23,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... [2020-11-28 03:21:23,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:23,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:23,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:23,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:23,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-28 03:21:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 03:21:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-28 03:21:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:23,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:21:24,459 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:24,460 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-28 03:21:24,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:24 BoogieIcfgContainer [2020-11-28 03:21:24,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:24,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:24,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:24,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:24,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:23" (1/3) ... [2020-11-28 03:21:24,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d572af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:24, skipping insertion in model container [2020-11-28 03:21:24,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:23" (2/3) ... [2020-11-28 03:21:24,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d572af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:24, skipping insertion in model container [2020-11-28 03:21:24,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:24" (3/3) ... [2020-11-28 03:21:24,470 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-28 03:21:24,480 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:24,484 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:21:24,496 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:21:24,519 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:24,520 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:21:24,520 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:24,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:24,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:24,521 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:24,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:24,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-28 03:21:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:21:24,539 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:24,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:24,540 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-28 03:21:24,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 03:21:24,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637279258] [2020-11-28 03:21:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 03:21:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:24,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 03:21:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:24,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637279258] [2020-11-28 03:21:24,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:24,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 03:21:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384690850] [2020-11-28 03:21:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:21:24,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-28 03:21:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:21:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:21:24,788 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-28 03:21:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:24,809 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-28 03:21:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:21:24,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-28 03:21:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:24,827 INFO L225 Difference]: With dead ends: 57 [2020-11-28 03:21:24,828 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:21:24,832 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 [2020-11-28 03:21:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:21:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-28 03:21:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 03:21:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-28 03:21:24,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-28 03:21:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:24,890 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-28 03:21:24,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:21:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-28 03:21:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:21:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:24,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:25,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 03:21:25,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-28 03:21:25,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 03:21:25,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024521385] [2020-11-28 03:21:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:21:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:25,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 03:21:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:25,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024521385] [2020-11-28 03:21:25,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:25,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-28 03:21:25,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046034771] [2020-11-28 03:21:25,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:21:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-28 03:21:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:21:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:21:25,336 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-11-28 03:21:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:25,470 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-11-28 03:21:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:21:25,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 03:21:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:25,473 INFO L225 Difference]: With dead ends: 50 [2020-11-28 03:21:25,473 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 03:21:25,474 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 [2020-11-28 03:21:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 03:21:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-11-28 03:21:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:21:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-28 03:21:25,489 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-28 03:21:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:25,490 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-28 03:21:25,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:21:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-28 03:21:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:21:25,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:25,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:25,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 03:21:25,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-28 03:21:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 03:21:25,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413891866] [2020-11-28 03:21:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/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 [2020-11-28 03:21:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:21:25,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:21:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:21:25,968 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:21:26,008 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-28 03:21:26,008 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:21:26,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 03:21:26,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:26 BoogieIcfgContainer [2020-11-28 03:21:26,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:26,239 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:26,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:26,239 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:26,240 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:24" (3/4) ... [2020-11-28 03:21:26,241 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:21:26,286 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_95edf2f9-5e5c-4cbb-8ea2-1d40ce9fd47a/bin/uautomizer/witness.graphml [2020-11-28 03:21:26,286 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:26,294 INFO L168 Benchmark]: Toolchain (without parser) took 2979.15 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 43.3 MB in the beginning and 61.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,294 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:26,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.38 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 32.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,297 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.64 ms. Allocated memory is still 62.9 MB. Free memory was 32.2 MB in the beginning and 45.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,298 INFO L168 Benchmark]: Boogie Preprocessor took 69.95 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:26,299 INFO L168 Benchmark]: RCFGBuilder took 720.59 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.3 MB in the end (delta: 948.5 kB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,300 INFO L168 Benchmark]: TraceAbstraction took 1774.94 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 43.0 MB in the beginning and 63.7 MB in the end (delta: -20.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,301 INFO L168 Benchmark]: Witness Printer took 47.69 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 61.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:26,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.38 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 32.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.64 ms. Allocated memory is still 62.9 MB. Free memory was 32.2 MB in the beginning and 45.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.95 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 720.59 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.3 MB in the end (delta: 948.5 kB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1774.94 ms. Allocated memory was 62.9 MB in the beginning and 88.1 MB in the end (delta: 25.2 MB). Free memory was 43.0 MB in the beginning and 63.7 MB in the end (delta: -20.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Witness Printer took 47.69 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 61.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 1.6s, 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, 0.0s 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...