./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ...................................................................................................................................................................................................................................................................................................... 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_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2020-12-09 07:24:51,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:24:51,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:24:51,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:24:51,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:24:51,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:24:51,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:24:51,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:24:51,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:24:51,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:24:51,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:24:51,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:24:51,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:24:51,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:24:51,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:24:51,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:24:51,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:24:51,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:24:51,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:24:51,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:24:51,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:24:51,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:24:51,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:24:51,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:24:51,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:24:51,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:24:51,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:24:51,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:24:51,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:24:51,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:24:51,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:24:51,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:24:51,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:24:51,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:24:51,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:24:51,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:24:51,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:24:51,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:24:51,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:24:51,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:24:51,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:24:51,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:24:51,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:24:51,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:24:51,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:24:51,886 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:24:51,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:24:51,886 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:24:51,887 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:24:51,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:24:51,888 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:24:51,888 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:24:51,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:24:51,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:24:51,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:24:51,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:24:51,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:24:51,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:24:51,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:24:51,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:24:51,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:24:51,892 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-12-09 07:24:52,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:24:52,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:24:52,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:24:52,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:24:52,078 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:24:52,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-09 07:24:52,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/c7dd4b8e7/cc463682aa234c3f84b19fbcc710db42/FLAG19a1126d0 [2020-12-09 07:24:52,520 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:24:52,520 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-09 07:24:52,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/c7dd4b8e7/cc463682aa234c3f84b19fbcc710db42/FLAG19a1126d0 [2020-12-09 07:24:52,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/c7dd4b8e7/cc463682aa234c3f84b19fbcc710db42 [2020-12-09 07:24:52,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:24:52,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:24:52,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:24:52,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:24:52,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:24:52,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a249066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52, skipping insertion in model container [2020-12-09 07:24:52,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:24:52,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:24:52,685 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-09 07:24:52,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:24:52,697 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:24:52,719 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-09 07:24:52,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:24:52,734 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:24:52,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52 WrapperNode [2020-12-09 07:24:52,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:24:52,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:24:52,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:24:52,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:24:52,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:24:52,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:24:52,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:24:52,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:24:52,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... [2020-12-09 07:24:52,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:24:52,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:24:52,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:24:52,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:24:52,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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 [2020-12-09 07:24:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:24:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:24:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 07:24:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:24:52,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:24:52,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:24:52,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:24:53,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:24:53,243 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 07:24:53,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:53 BoogieIcfgContainer [2020-12-09 07:24:53,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:24:53,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:24:53,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:24:53,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:24:53,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:24:52" (1/3) ... [2020-12-09 07:24:53,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:53, skipping insertion in model container [2020-12-09 07:24:53,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:52" (2/3) ... [2020-12-09 07:24:53,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:53, skipping insertion in model container [2020-12-09 07:24:53,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:53" (3/3) ... [2020-12-09 07:24:53,253 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-12-09 07:24:53,266 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:24:53,269 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:24:53,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:24:53,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:24:53,302 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:24:53,302 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:24:53,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:24:53,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:24:53,303 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:24:53,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:24:53,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:24:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 07:24:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:24:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:53,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:53,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2020-12-09 07:24:53,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:24:53,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271029850] [2020-12-09 07:24:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:24:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271029850] [2020-12-09 07:24:53,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:53,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:24:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209415146] [2020-12-09 07:24:53,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:24:53,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:24:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:24:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:24:53,445 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 07:24:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:53,455 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-09 07:24:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:24:53,457 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 07:24:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:53,463 INFO L225 Difference]: With dead ends: 35 [2020-12-09 07:24:53,463 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 07:24:53,466 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 [2020-12-09 07:24:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 07:24:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 07:24:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 07:24:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 07:24:53,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-09 07:24:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:53,488 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 07:24:53,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:24:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 07:24:53,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 07:24:53,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:53,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:53,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:24:53,489 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2020-12-09 07:24:53,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:24:53,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278635645] [2020-12-09 07:24:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:24:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:24:53,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:24:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:24:53,555 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:24:53,570 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:24:53,571 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:24:53,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:24:53,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:24:53 BoogieIcfgContainer [2020-12-09 07:24:53,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:24:53,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:24:53,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:24:53,589 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:24:53,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:53" (3/4) ... [2020-12-09 07:24:53,591 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:24:53,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:24:53,593 INFO L168 Benchmark]: Toolchain (without parser) took 1054.19 ms. Allocated memory is still 119.5 MB. Free memory was 67.9 MB in the beginning and 76.9 MB in the end (delta: -9.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:24:53,593 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 119.5 MB. Free memory is still 84.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:24:53,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.96 ms. Allocated memory is still 119.5 MB. Free memory was 67.7 MB in the beginning and 95.3 MB in the end (delta: -27.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:24:53,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.70 ms. Allocated memory is still 119.5 MB. Free memory was 95.3 MB in the beginning and 93.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:24:53,594 INFO L168 Benchmark]: Boogie Preprocessor took 27.10 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 92.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:24:53,595 INFO L168 Benchmark]: RCFGBuilder took 444.53 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 56.2 MB in the end (delta: 36.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:24:53,595 INFO L168 Benchmark]: TraceAbstraction took 341.43 ms. Allocated memory is still 119.5 MB. Free memory was 55.9 MB in the beginning and 76.9 MB in the end (delta: -21.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:24:53,596 INFO L168 Benchmark]: Witness Printer took 2.74 ms. Allocated memory is still 119.5 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:24:53,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 119.5 MB. Free memory is still 84.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 195.96 ms. Allocated memory is still 119.5 MB. Free memory was 67.7 MB in the beginning and 95.3 MB in the end (delta: -27.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.70 ms. Allocated memory is still 119.5 MB. Free memory was 95.3 MB in the beginning and 93.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.10 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 92.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 444.53 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 56.2 MB in the end (delta: 36.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 341.43 ms. Allocated memory is still 119.5 MB. Free memory was 55.9 MB in the beginning and 76.9 MB in the end (delta: -21.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.74 ms. Allocated memory is still 119.5 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 0.2.0-7b2dab5 [2020-12-09 07:24:55,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:24:55,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:24:55,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:24:55,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:24:55,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:24:55,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:24:55,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:24:55,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:24:55,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:24:55,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:24:55,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:24:55,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:24:55,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:24:55,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:24:55,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:24:55,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:24:55,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:24:55,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:24:55,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:24:55,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:24:55,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:24:55,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:24:55,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:24:55,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:24:55,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:24:55,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:24:55,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:24:55,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:24:55,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:24:55,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:24:55,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:24:55,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:24:55,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:24:55,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:24:55,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:24:55,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:24:55,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:24:55,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:24:55,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:24:55,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:24:55,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:24:55,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:24:55,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:24:55,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:24:55,403 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:24:55,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:24:55,404 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:24:55,404 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:24:55,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:24:55,404 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:24:55,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:24:55,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:24:55,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:24:55,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:24:55,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:24:55,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:24:55,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:24:55,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:24:55,407 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:24:55,407 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:24:55,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:24:55,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:24:55,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:24:55,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:24:55,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:24:55,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:24:55,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:24:55,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:24:55,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:24:55,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:24:55,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:24:55,409 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:24:55,409 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:24:55,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:24:55,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:24:55,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:24:55,410 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_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-12-09 07:24:55,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:24:55,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:24:55,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:24:55,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:24:55,672 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:24:55,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-09 07:24:55,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/b20a5f77c/3d05855e05a7440cb686060c69f1c6b7/FLAG09e3cb725 [2020-12-09 07:24:56,116 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:24:56,116 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2020-12-09 07:24:56,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/b20a5f77c/3d05855e05a7440cb686060c69f1c6b7/FLAG09e3cb725 [2020-12-09 07:24:56,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/data/b20a5f77c/3d05855e05a7440cb686060c69f1c6b7 [2020-12-09 07:24:56,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:24:56,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:24:56,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:24:56,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:24:56,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:24:56,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75da274c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56, skipping insertion in model container [2020-12-09 07:24:56,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:24:56,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:24:56,278 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-09 07:24:56,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:24:56,292 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:24:56,319 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-09 07:24:56,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:24:56,334 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:24:56,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56 WrapperNode [2020-12-09 07:24:56,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:24:56,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:24:56,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:24:56,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:24:56,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:24:56,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:24:56,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:24:56,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:24:56,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... [2020-12-09 07:24:56,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:24:56,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:24:56,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:24:56,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:24:56,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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 [2020-12-09 07:24:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:24:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:24:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 07:24:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:24:56,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:24:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-09 07:24:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:24:56,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:24:56,749 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 07:24:56,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:56 BoogieIcfgContainer [2020-12-09 07:24:56,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:24:56,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:24:56,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:24:56,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:24:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:24:56" (1/3) ... [2020-12-09 07:24:56,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1b3075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:56, skipping insertion in model container [2020-12-09 07:24:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:24:56" (2/3) ... [2020-12-09 07:24:56,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1b3075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:24:56, skipping insertion in model container [2020-12-09 07:24:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:56" (3/3) ... [2020-12-09 07:24:56,756 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-12-09 07:24:56,765 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:24:56,767 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:24:56,775 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:24:56,792 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:24:56,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:24:56,792 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:24:56,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:24:56,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:24:56,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:24:56,792 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:24:56,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:24:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 07:24:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 07:24:56,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:56,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:56,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-09 07:24:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:56,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591817949] [2020-12-09 07:24:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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 [2020-12-09 07:24:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:56,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 07:24:56,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:56,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:56,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591817949] [2020-12-09 07:24:56,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:56,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:24:56,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2800632] [2020-12-09 07:24:56,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:24:56,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:24:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:24:56,928 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 07:24:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:56,942 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-09 07:24:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:24:56,943 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-09 07:24:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:56,950 INFO L225 Difference]: With dead ends: 62 [2020-12-09 07:24:56,950 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 07:24:56,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:24:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 07:24:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 07:24:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 07:24:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-09 07:24:56,977 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-09 07:24:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:56,977 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-09 07:24:56,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:24:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-09 07:24:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:24:56,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:56,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:57,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:24:57,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-09 07:24:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:57,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850999344] [2020-12-09 07:24:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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 [2020-12-09 07:24:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:24:57,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:57,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850999344] [2020-12-09 07:24:57,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:57,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:24:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854177210] [2020-12-09 07:24:57,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:24:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:24:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:24:57,263 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-09 07:24:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:57,306 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 07:24:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:24:57,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 07:24:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:57,307 INFO L225 Difference]: With dead ends: 53 [2020-12-09 07:24:57,307 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 07:24:57,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:24:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 07:24:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-09 07:24:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 07:24:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-09 07:24:57,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-09 07:24:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:57,312 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-09 07:24:57,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:24:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-09 07:24:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:24:57,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:57,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:57,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 07:24:57,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-09 07:24:57,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:57,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437586043] [2020-12-09 07:24:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/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 [2020-12-09 07:24:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:57,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:24:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:57,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:57,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437586043] [2020-12-09 07:24:57,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:57,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:24:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028611132] [2020-12-09 07:24:57,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:24:57,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:24:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:24:57,694 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-09 07:24:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:57,730 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-12-09 07:24:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:24:57,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 07:24:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:57,731 INFO L225 Difference]: With dead ends: 50 [2020-12-09 07:24:57,732 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 07:24:57,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:24:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 07:24:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 07:24:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 07:24:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-09 07:24:57,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2020-12-09 07:24:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:57,735 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-09 07:24:57,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:24:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-09 07:24:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 07:24:57,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:57,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:57,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 07:24:57,937 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-09 07:24:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:57,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126819522] [2020-12-09 07:24:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 07:24:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:24:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:58,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126819522] [2020-12-09 07:24:58,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:58,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:24:58,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488262396] [2020-12-09 07:24:58,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:24:58,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:58,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:24:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:24:58,131 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-09 07:24:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:58,158 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-09 07:24:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:24:58,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 07:24:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:58,159 INFO L225 Difference]: With dead ends: 48 [2020-12-09 07:24:58,159 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 07:24:58,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:24:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 07:24:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-12-09 07:24:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 07:24:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-09 07:24:58,163 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-12-09 07:24:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-09 07:24:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:24:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-09 07:24:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:24:58,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:58,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:58,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 07:24:58,366 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2020-12-09 07:24:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37546836] [2020-12-09 07:24:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 07:24:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:24:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:58,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:58,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37546836] [2020-12-09 07:24:58,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:58,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 07:24:58,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396276487] [2020-12-09 07:24:58,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:24:58,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:58,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:24:58,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:24:58,498 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-09 07:24:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:58,535 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-09 07:24:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:24:58,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 07:24:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:58,536 INFO L225 Difference]: With dead ends: 39 [2020-12-09 07:24:58,536 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:24:58,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:24:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:24:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 07:24:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 07:24:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-09 07:24:58,539 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-12-09 07:24:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:58,539 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-09 07:24:58,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:24:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-09 07:24:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:24:58,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:58,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:58,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 07:24:58,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-09 07:24:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:58,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112055495] [2020-12-09 07:24:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 07:24:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:24:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:58,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112055495] [2020-12-09 07:24:58,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:58,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:24:58,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890178916] [2020-12-09 07:24:58,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:24:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:58,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:24:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:24:58,893 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-12-09 07:24:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:58,898 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-09 07:24:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:24:58,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 07:24:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:58,899 INFO L225 Difference]: With dead ends: 33 [2020-12-09 07:24:58,899 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:24:58,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:24:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:24:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 07:24:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 07:24:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-09 07:24:58,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2020-12-09 07:24:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:58,902 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-09 07:24:58,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:24:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-09 07:24:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:24:58,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:58,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:59,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 07:24:59,104 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-09 07:24:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:59,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345804807] [2020-12-09 07:24:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 07:24:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:24:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 07:24:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:24:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:24:59,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:24:59,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345804807] [2020-12-09 07:24:59,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:24:59,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 07:24:59,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631853495] [2020-12-09 07:24:59,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:24:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:24:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:24:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:24:59,246 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-12-09 07:24:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:24:59,289 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2020-12-09 07:24:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:24:59,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 07:24:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:24:59,290 INFO L225 Difference]: With dead ends: 26 [2020-12-09 07:24:59,290 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:24:59,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:24:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:24:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 07:24:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 07:24:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-12-09 07:24:59,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 18 [2020-12-09 07:24:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:24:59,293 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-12-09 07:24:59,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:24:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-12-09 07:24:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 07:24:59,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:24:59,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:24:59,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 07:24:59,495 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:24:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:24:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-09 07:24:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:24:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165074638] [2020-12-09 07:24:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 07:24:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:24:59,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:24:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:24:59,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:24:59,783 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 07:24:59,783 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:24:59,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 07:25:00,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:25:00 BoogieIcfgContainer [2020-12-09 07:25:00,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:25:00,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:25:00,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:25:00,047 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:25:00,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:24:56" (3/4) ... [2020-12-09 07:25:00,049 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:25:00,085 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c9bed3c3-2b56-454b-888e-4ad6d6ed7da3/bin/utaipan/witness.graphml [2020-12-09 07:25:00,085 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:25:00,087 INFO L168 Benchmark]: Toolchain (without parser) took 3951.25 ms. Allocated memory was 54.5 MB in the beginning and 88.1 MB in the end (delta: 33.6 MB). Free memory was 32.2 MB in the beginning and 54.1 MB in the end (delta: -21.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,088 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.6 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:25:00,088 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.47 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 32.1 MB in the beginning and 56.5 MB in the end (delta: -24.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.89 ms. Allocated memory is still 73.4 MB. Free memory was 56.5 MB in the beginning and 54.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:25:00,089 INFO L168 Benchmark]: Boogie Preprocessor took 25.12 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,090 INFO L168 Benchmark]: RCFGBuilder took 358.62 ms. Allocated memory is still 73.4 MB. Free memory was 53.1 MB in the beginning and 51.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,090 INFO L168 Benchmark]: TraceAbstraction took 3294.90 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 50.6 MB in the beginning and 56.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,091 INFO L168 Benchmark]: Witness Printer took 38.81 ms. Allocated memory is still 88.1 MB. Free memory was 56.8 MB in the beginning and 54.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:25:00,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.6 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 199.47 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 32.1 MB in the beginning and 56.5 MB in the end (delta: -24.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.89 ms. Allocated memory is still 73.4 MB. Free memory was 56.5 MB in the beginning and 54.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.12 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 358.62 ms. Allocated memory is still 73.4 MB. Free memory was 53.1 MB in the beginning and 51.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3294.90 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 50.6 MB in the beginning and 56.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Witness Printer took 38.81 ms. Allocated memory is still 88.1 MB. Free memory was 56.8 MB in the beginning and 54.1 MB in the end (delta: 2.8 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: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 118 SDslu, 217 SDs, 0 SdLazy, 82 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 4207 SizeOfPredicates, 27 NumberOfNonLiveVariables, 403 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...