./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8 --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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c .......................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8 --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 7f8d72d06ca136037e1a4f2d3dda81b71758b03c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:57:36,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:57:36,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:57:36,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:57:36,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:57:36,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:57:36,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:57:36,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:57:36,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:57:36,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:57:36,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:57:36,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:57:36,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:57:36,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:57:36,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:57:36,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:57:36,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:57:36,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:57:36,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:57:36,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:57:36,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:57:36,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:57:36,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:57:36,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:57:36,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:57:36,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:57:36,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:57:36,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:57:36,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:57:36,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:57:36,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:57:36,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:57:36,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:57:36,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:57:36,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:57:36,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:57:36,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:57:36,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:57:36,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:57:36,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:57:36,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:57:36,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:57:36,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:57:36,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:57:36,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:57:36,911 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:57:36,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:57:36,912 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:57:36,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:57:36,913 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:57:36,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:57:36,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:57:36,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:57:36,914 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:57:36,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:57:36,915 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:57:36,915 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:57:36,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:57:36,916 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:57:36,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:57:36,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:57:36,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:57:36,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:57:36,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:57:36,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:57:36,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:57:36,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:57:36,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:57:36,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:57:36,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:57:36,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:57:36,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:57:36,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:36,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:57:36,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:57:36,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:57:36,922 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:57:36,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:57:36,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:57:36,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:57:36,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:57:36,924 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_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2021-10-13 07:57:37,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:57:37,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:57:37,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:57:37,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:57:37,276 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:57:37,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-10-13 07:57:37,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/9e8ff7bdf/d78ff888d2794970b2eccea02eb57b50/FLAG3189b12fb [2021-10-13 07:57:37,877 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:57:37,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-10-13 07:57:37,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/9e8ff7bdf/d78ff888d2794970b2eccea02eb57b50/FLAG3189b12fb [2021-10-13 07:57:38,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/9e8ff7bdf/d78ff888d2794970b2eccea02eb57b50 [2021-10-13 07:57:38,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:57:38,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:57:38,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:38,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:57:38,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:57:38,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3a8191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38, skipping insertion in model container [2021-10-13 07:57:38,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:57:38,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:57:38,522 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-10-13 07:57:38,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:38,535 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:57:38,559 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-10-13 07:57:38,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:38,578 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:57:38,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38 WrapperNode [2021-10-13 07:57:38,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:38,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:38,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:57:38,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:57:38,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:38,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:57:38,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:57:38,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:57:38,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:57:38,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:57:38,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:57:38,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:57:38,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (1/1) ... [2021-10-13 07:57:38,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:38,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:57:38,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:57:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:57:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:57:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 07:57:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:57:38,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:57:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:57:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:57:39,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:57:39,439 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:57:39,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:39 BoogieIcfgContainer [2021-10-13 07:57:39,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:57:39,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:57:39,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:57:39,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:57:39,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:57:38" (1/3) ... [2021-10-13 07:57:39,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b12657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:39, skipping insertion in model container [2021-10-13 07:57:39,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:38" (2/3) ... [2021-10-13 07:57:39,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b12657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:39, skipping insertion in model container [2021-10-13 07:57:39,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:39" (3/3) ... [2021-10-13 07:57:39,462 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-10-13 07:57:39,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:57:39,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:57:39,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:57:39,556 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:57:39,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:57:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:57:39,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:39,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:39,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1118937600, now seen corresponding path program 1 times [2021-10-13 07:57:39,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:57:39,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660954802] [2021-10-13 07:57:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:39,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:57:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:39,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:57:39,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660954802] [2021-10-13 07:57:39,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660954802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:39,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:39,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:57:39,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679000111] [2021-10-13 07:57:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:57:39,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:57:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:57:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:39,797 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:39,815 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-13 07:57:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:57:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:57:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:39,827 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:57:39,827 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 07:57:39,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 07:57:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 07:57:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 07:57:39,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-13 07:57:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:39,866 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 07:57:39,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 07:57:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:57:39,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:39,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:39,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:57:39,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:39,870 INFO L82 PathProgramCache]: Analyzing trace with hash 355811273, now seen corresponding path program 1 times [2021-10-13 07:57:39,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:57:39,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730966897] [2021-10-13 07:57:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:39,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:57:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:57:39,934 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:57:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:57:40,059 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:57:40,063 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:57:40,065 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:57:40,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:57:40,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:57:40,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:57:40 BoogieIcfgContainer [2021-10-13 07:57:40,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:57:40,114 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:57:40,114 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:57:40,116 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:57:40,116 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:39" (3/4) ... [2021-10-13 07:57:40,120 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:57:40,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:57:40,124 INFO L168 Benchmark]: Toolchain (without parser) took 1885.20 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.1 MB in the beginning and 58.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,124 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.7 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:40,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.32 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.9 MB in the beginning and 83.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.06 ms. Allocated memory is still 107.0 MB. Free memory was 82.9 MB in the beginning and 81.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,137 INFO L168 Benchmark]: Boogie Preprocessor took 32.94 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 79.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,137 INFO L168 Benchmark]: RCFGBuilder took 740.24 ms. Allocated memory is still 107.0 MB. Free memory was 79.7 MB in the beginning and 83.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,138 INFO L168 Benchmark]: TraceAbstraction took 665.20 ms. Allocated memory is still 107.0 MB. Free memory was 83.4 MB in the beginning and 59.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:40,140 INFO L168 Benchmark]: Witness Printer took 6.55 ms. Allocated memory is still 107.0 MB. Free memory was 59.1 MB in the beginning and 58.8 MB in the end (delta: 353.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:40,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.7 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.32 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.9 MB in the beginning and 83.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.06 ms. Allocated memory is still 107.0 MB. Free memory was 82.9 MB in the beginning and 81.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.94 ms. Allocated memory is still 107.0 MB. Free memory was 81.1 MB in the beginning and 79.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 740.24 ms. Allocated memory is still 107.0 MB. Free memory was 79.7 MB in the beginning and 83.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 665.20 ms. Allocated memory is still 107.0 MB. Free memory was 83.4 MB in the beginning and 59.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 6.55 ms. Allocated memory is still 107.0 MB. Free memory was 59.1 MB in the beginning and 58.8 MB in the end (delta: 353.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] 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. OverallTime: 531.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 28.9ms, AutomataDifference: 51.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.3ms SsaConstructionTime, 84.3ms SatisfiabilityAnalysisTime, 52.6ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 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 [2021-10-13 07:57:40,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:57:43,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:57:43,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:57:43,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:57:43,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:57:43,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:57:43,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:57:43,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:57:43,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:57:43,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:57:43,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:57:43,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:57:43,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:57:43,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:57:43,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:57:43,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:57:43,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:57:43,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:57:43,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:57:43,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:57:43,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:57:43,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:57:43,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:57:43,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:57:43,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:57:43,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:57:43,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:57:43,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:57:43,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:57:43,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:57:43,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:57:43,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:57:43,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:57:43,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:57:43,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:57:43,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:57:43,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:57:43,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:57:43,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:57:43,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:57:43,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:57:43,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:57:43,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:57:43,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:57:43,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:57:43,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:57:43,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:57:43,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:57:43,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:57:43,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:57:43,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:57:43,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:57:43,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:57:43,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:57:43,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:57:43,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:57:43,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:57:43,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:57:43,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:57:43,412 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:57:43,412 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:57:43,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:57:43,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:57:43,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:57:43,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:57:43,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:57:43,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:57:43,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:57:43,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:43,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:57:43,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:57:43,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:57:43,415 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:57:43,415 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:43,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:57:43,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:57:43,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:57:43,416 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_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2021-10-13 07:57:43,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:57:43,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:57:44,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:57:44,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:57:44,005 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:57:44,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-10-13 07:57:44,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/8bef922d8/0d192ec6d89f427eac7c8da0b4a5738f/FLAG716058b5b [2021-10-13 07:57:44,680 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:57:44,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-10-13 07:57:44,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/8bef922d8/0d192ec6d89f427eac7c8da0b4a5738f/FLAG716058b5b [2021-10-13 07:57:45,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/data/8bef922d8/0d192ec6d89f427eac7c8da0b4a5738f [2021-10-13 07:57:45,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:57:45,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:57:45,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:45,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:57:45,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:57:45,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b74c590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45, skipping insertion in model container [2021-10-13 07:57:45,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:57:45,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:57:45,240 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-10-13 07:57:45,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:45,258 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:57:45,288 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-10-13 07:57:45,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:57:45,347 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:57:45,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45 WrapperNode [2021-10-13 07:57:45,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:57:45,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:45,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:57:45,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:57:45,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:57:45,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:57:45,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:57:45,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:57:45,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:57:45,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:57:45,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:57:45,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:57:45,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (1/1) ... [2021-10-13 07:57:45,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:57:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:57:45,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:57:45,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:57:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:57:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:57:45,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:57:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:57:45,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:57:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-13 07:57:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:57:46,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:57:46,119 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:57:46,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:46 BoogieIcfgContainer [2021-10-13 07:57:46,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:57:46,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:57:46,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:57:46,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:57:46,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:57:45" (1/3) ... [2021-10-13 07:57:46,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584ae5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:46, skipping insertion in model container [2021-10-13 07:57:46,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:57:45" (2/3) ... [2021-10-13 07:57:46,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584ae5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:57:46, skipping insertion in model container [2021-10-13 07:57:46,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:46" (3/3) ... [2021-10-13 07:57:46,140 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-10-13 07:57:46,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:57:46,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:57:46,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:57:46,252 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:57:46,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:57:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:57:46,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:46,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:46,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 07:57:46,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:46,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072665875] [2021-10-13 07:57:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:46,336 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:46,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:46,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:57:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:57:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:46,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:46,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072665875] [2021-10-13 07:57:46,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072665875] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:46,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:46,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:57:46,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334455130] [2021-10-13 07:57:46,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:57:46,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:57:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:46,618 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:46,640 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 07:57:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:57:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:57:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:46,652 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:57:46,652 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:57:46,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:57:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:57:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 07:57:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 07:57:46,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 07:57:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:46,692 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 07:57:46,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 07:57:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:57:46,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:46,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:46,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:46,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:46,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 07:57:46,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:46,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480176349] [2021-10-13 07:57:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:46,910 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:46,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:46,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:46,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:57:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:57:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:47,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:47,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:47,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480176349] [2021-10-13 07:57:47,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480176349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:47,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:57:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075366436] [2021-10-13 07:57:47,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:57:47,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:57:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:57:47,204 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:47,354 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-13 07:57:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:57:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:57:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:47,357 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:57:47,357 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 07:57:47,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:57:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 07:57:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-13 07:57:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 07:57:47,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 07:57:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:47,369 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 07:57:47,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 07:57:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:57:47,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:47,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:47,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:47,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:47,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 07:57:47,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:47,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610412822] [2021-10-13 07:57:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:47,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:47,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:57:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:57:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:47,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:47,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610412822] [2021-10-13 07:57:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610412822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:47,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:47,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:57:47,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722765547] [2021-10-13 07:57:47,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:57:47,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:57:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:57:47,938 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:48,005 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-13 07:57:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:57:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:57:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:48,007 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:57:48,007 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:57:48,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:57:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:57:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 07:57:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 07:57:48,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-13 07:57:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:48,014 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 07:57:48,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 07:57:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:57:48,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:48,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:48,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:48,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:48,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-13 07:57:48,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:48,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977640110] [2021-10-13 07:57:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:48,236 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:48,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:48,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:57:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:57:48,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:48,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:48,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:48,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977640110] [2021-10-13 07:57:48,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977640110] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:48,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:48,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:57:48,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80908587] [2021-10-13 07:57:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:57:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:57:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:57:48,522 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:48,616 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-13 07:57:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:57:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:57:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:48,619 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:57:48,619 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:57:48,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:57:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:57:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-13 07:57:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-13 07:57:48,627 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-13 07:57:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:48,628 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-13 07:57:48,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-13 07:57:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:57:48,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:48,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:48,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:48,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-13 07:57:48,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:48,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516838786] [2021-10-13 07:57:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:48,833 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:48,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:48,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:57:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:57:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:49,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:49,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:49,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516838786] [2021-10-13 07:57:49,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516838786] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:49,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:49,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:57:49,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966891200] [2021-10-13 07:57:49,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:57:49,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:57:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:57:49,325 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:49,349 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-13 07:57:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:57:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:57:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:49,352 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:57:49,354 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:57:49,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:57:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:57:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 07:57:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 07:57:49,367 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-13 07:57:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:49,368 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 07:57:49,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 07:57:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:57:49,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:49,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:49,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:49,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:49,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-13 07:57:49,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:49,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847070256] [2021-10-13 07:57:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:49,600 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:49,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:49,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:57:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:57:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:49,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:49,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:49,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847070256] [2021-10-13 07:57:49,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847070256] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:49,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:49,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 07:57:49,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503519082] [2021-10-13 07:57:49,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:57:49,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:57:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:57:49,994 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:50,120 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-13 07:57:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:57:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:57:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:50,122 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:57:50,122 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 07:57:50,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:57:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 07:57:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-13 07:57:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-13 07:57:50,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-13 07:57:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:50,130 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-13 07:57:50,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-13 07:57:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:57:50,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:50,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:50,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:50,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:50,354 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-13 07:57:50,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:50,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798932212] [2021-10-13 07:57:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:50,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:50,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:50,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:57:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:57:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:50,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:50,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:50,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798932212] [2021-10-13 07:57:50,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798932212] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:50,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:50,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:57:50,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443101437] [2021-10-13 07:57:50,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:57:50,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:57:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:57:50,758 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:50,823 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-13 07:57:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:57:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:57:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:50,832 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:57:50,832 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:57:50,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:57:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:57:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:57:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-13 07:57:50,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-13 07:57:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-13 07:57:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-13 07:57:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:57:50,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:50,842 INFO L512 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] [2021-10-13 07:57:50,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:51,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:51,059 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:57:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-13 07:57:51,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:51,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140516804] [2021-10-13 07:57:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:51,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:51,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:51,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:57:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:57:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:51,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:57:52,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:52,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140516804] [2021-10-13 07:57:52,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140516804] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:57:52,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:57:52,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-10-13 07:57:52,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075849633] [2021-10-13 07:57:52,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:57:52,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:57:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:57:52,038 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:52,269 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2021-10-13 07:57:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:57:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 07:57:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:52,272 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:57:52,272 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:57:52,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:57:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:57:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:57:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:57:52,274 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-10-13 07:57:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:52,274 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:57:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:57:52,275 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:57:52,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:57:52,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:57:52,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:57:52,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:57:52,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:57:52,783 INFO L860 garLoopResultBuilder]: At program point L85(lines 67 86) the Hoare annotation is: true [2021-10-13 07:57:52,784 INFO L857 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-10-13 07:57:52,784 INFO L857 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2021-10-13 07:57:52,784 INFO L853 garLoopResultBuilder]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24))) [2021-10-13 07:57:52,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:57:52,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 47) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2021-10-13 07:57:52,785 INFO L853 garLoopResultBuilder]: At program point L64(lines 55 65) the Hoare annotation is: (and (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))) |ULTIMATE.start_main_#t~short14| (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= |ULTIMATE.start___signbit_float_#res| (_ bv0 32))) [2021-10-13 07:57:52,785 INFO L857 garLoopResultBuilder]: For program point L81(line 81) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L857 garLoopResultBuilder]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L857 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2021-10-13 07:57:52,786 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x))) [2021-10-13 07:57:52,787 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2021-10-13 07:57:52,787 INFO L857 garLoopResultBuilder]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2021-10-13 07:57:52,787 INFO L853 garLoopResultBuilder]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2021-10-13 07:57:52,787 INFO L857 garLoopResultBuilder]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2021-10-13 07:57:52,787 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-10-13 07:57:52,787 INFO L853 garLoopResultBuilder]: At program point L41(lines 21 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start_fmax_float_~x .cse0) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x))) [2021-10-13 07:57:52,787 INFO L853 garLoopResultBuilder]: At program point L41-1(lines 21 42) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|))) [2021-10-13 07:57:52,788 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:57:52,788 INFO L857 garLoopResultBuilder]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2021-10-13 07:57:52,788 INFO L853 garLoopResultBuilder]: At program point L58-2(lines 58 62) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short14| (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x)) [2021-10-13 07:57:52,788 INFO L857 garLoopResultBuilder]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2021-10-13 07:57:52,788 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2021-10-13 07:57:52,788 INFO L857 garLoopResultBuilder]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2021-10-13 07:57:52,800 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:57:52,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:57:52 BoogieIcfgContainer [2021-10-13 07:57:52,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:57:52,831 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:57:52,831 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:57:52,831 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:57:52,832 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:57:46" (3/4) ... [2021-10-13 07:57:52,835 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:57:52,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-13 07:57:52,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:57:52,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 07:57:52,851 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:57:52,894 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x [2021-10-13 07:57:52,895 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE() [2021-10-13 07:57:52,897 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x [2021-10-13 07:57:52,897 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result) [2021-10-13 07:57:52,899 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && \result == 0bv32 [2021-10-13 07:57:52,935 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:57:52,935 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:57:52,937 INFO L168 Benchmark]: Toolchain (without parser) took 7924.41 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 44.7 MB in the beginning and 36.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,938 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:52,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.03 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 46.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.64 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 44.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,940 INFO L168 Benchmark]: Boogie Preprocessor took 41.38 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:57:52,941 INFO L168 Benchmark]: RCFGBuilder took 646.48 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 30.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,941 INFO L168 Benchmark]: TraceAbstraction took 6706.70 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 29.6 MB in the beginning and 40.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,942 INFO L168 Benchmark]: Witness Printer took 104.48 ms. Allocated memory is still 81.8 MB. Free memory was 40.2 MB in the beginning and 36.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:57:52,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 62.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.03 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 46.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.64 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 44.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.38 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 646.48 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 30.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6706.70 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 29.6 MB in the beginning and 40.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Witness Printer took 104.48 ms. Allocated memory is still 81.8 MB. Free memory was 40.2 MB in the beginning and 36.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 81]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6562.2ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 35.7ms, AutomataDifference: 853.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 293.1ms, InitialAbstractionConstructionTime: 29.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 203 SDslu, 403 SDs, 0 SdLazy, 147 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 317.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 757.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 168 HoareAnnotationTreeSize, 8 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 144.7ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 140.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 124.3ms SsaConstructionTime, 323.7ms SatisfiabilityAnalysisTime, 2389.5ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 818 SizeOfPredicates, 38 NumberOfNonLiveVariables, 493 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && \result == 0bv32 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:57:53,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e679d3-568a-4a0e-bd6f-18f700adcf47/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...