./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE --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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 ............................................................................................................................................................................................................................................... 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE --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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:01:17,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:01:17,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:01:17,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:01:17,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:01:17,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:01:17,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:01:17,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:01:17,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:01:17,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:01:17,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:01:17,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:01:17,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:01:17,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:01:17,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:01:17,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:01:17,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:01:17,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:01:17,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:01:17,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:01:17,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:01:17,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:01:17,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:01:17,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:01:17,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:01:17,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:01:17,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:01:17,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:01:17,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:01:17,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:01:17,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:01:17,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:01:17,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:01:17,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:01:17,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:01:17,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:01:17,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:01:17,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:01:17,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:01:17,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:01:17,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:01:17,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:01:17,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:01:17,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:01:17,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:01:17,325 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:01:17,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:01:17,325 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:01:17,325 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:01:17,326 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:01:17,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:01:17,332 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:01:17,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:01:17,333 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:01:17,334 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:01:17,334 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:01:17,334 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:01:17,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:01:17,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:01:17,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:01:17,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:01:17,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:01:17,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:01:17,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:01:17,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:01:17,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:01:17,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:01:17,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:01:17,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:01:17,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:01:17,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:01:17,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:01:17,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:01:17,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:01:17,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:01:17,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:01:17,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:01:17,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:01:17,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:01:17,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:01:17,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:01:17,342 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-10-24 10:01:17,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:01:17,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:01:17,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:01:17,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:01:17,638 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:01:17,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-10-24 10:01:17,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/1a59d118a/9bd2643598ce4ee3bdf35bb01b0c5910/FLAGda1b00782 [2021-10-24 10:01:18,244 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:01:18,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-10-24 10:01:18,257 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/1a59d118a/9bd2643598ce4ee3bdf35bb01b0c5910/FLAGda1b00782 [2021-10-24 10:01:18,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/1a59d118a/9bd2643598ce4ee3bdf35bb01b0c5910 [2021-10-24 10:01:18,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:01:18,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:01:18,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:01:18,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:01:18,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:01:18,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ad14a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18, skipping insertion in model container [2021-10-24 10:01:18,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:01:18,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:01:18,811 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-10-24 10:01:18,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:01:18,828 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:01:18,841 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-10-24 10:01:18,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:01:18,857 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:01:18,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18 WrapperNode [2021-10-24 10:01:18,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:01:18,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:01:18,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:01:18,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:01:18,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:01:18,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:01:18,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:01:18,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:01:18,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:01:18,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:01:18,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:01:18,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:01:18,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (1/1) ... [2021-10-24 10:01:18,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:01:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:01:18,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:01:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:01:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:01:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:01:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:01:19,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:01:19,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:01:19,276 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:01:19,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:01:19 BoogieIcfgContainer [2021-10-24 10:01:19,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:01:19,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:01:19,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:01:19,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:01:19,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:01:18" (1/3) ... [2021-10-24 10:01:19,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468e9f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:01:19, skipping insertion in model container [2021-10-24 10:01:19,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:18" (2/3) ... [2021-10-24 10:01:19,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468e9f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:01:19, skipping insertion in model container [2021-10-24 10:01:19,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:01:19" (3/3) ... [2021-10-24 10:01:19,303 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-10-24 10:01:19,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:01:19,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:01:19,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:01:19,364 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, mAutomataTypeConcurrency=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 [2021-10-24 10:01:19,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:01:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2021-10-24 10:01:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:01:19,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:01:19,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:01:19,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:01:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:01:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-10-24 10:01:19,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:01:19,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738317027] [2021-10-24 10:01:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:01:19,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:01:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:01:19,526 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:01:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:01:19,569 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:01:19,571 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:01:19,572 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:01:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:01:19,587 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:01:19,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:01:19 BoogieIcfgContainer [2021-10-24 10:01:19,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:01:19,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:01:19,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:01:19,610 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:01:19,611 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:01:19" (3/4) ... [2021-10-24 10:01:19,614 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:01:19,614 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:01:19,619 INFO L168 Benchmark]: Toolchain (without parser) took 997.19 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.8 MB in the beginning and 66.6 MB in the end (delta: -3.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,620 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:01:19,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.94 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.6 MB in the beginning and 92.3 MB in the end (delta: -29.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.17 ms. Allocated memory is still 117.4 MB. Free memory was 92.3 MB in the beginning and 90.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,624 INFO L168 Benchmark]: Boogie Preprocessor took 32.64 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 89.7 MB in the end (delta: 967.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,625 INFO L168 Benchmark]: RCFGBuilder took 352.09 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 80.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,632 INFO L168 Benchmark]: TraceAbstraction took 321.55 ms. Allocated memory is still 117.4 MB. Free memory was 79.7 MB in the beginning and 67.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,633 INFO L168 Benchmark]: Witness Printer took 4.60 ms. Allocated memory is still 117.4 MB. Free memory was 67.2 MB in the beginning and 66.6 MB in the end (delta: 564.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:01:19,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.94 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.6 MB in the beginning and 92.3 MB in the end (delta: -29.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.17 ms. Allocated memory is still 117.4 MB. Free memory was 92.3 MB in the beginning and 90.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.64 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 89.7 MB in the end (delta: 967.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 352.09 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 80.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 321.55 ms. Allocated memory is still 117.4 MB. Free memory was 79.7 MB in the beginning and 67.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.60 ms. Allocated memory is still 117.4 MB. Free memory was 67.2 MB in the beginning and 66.6 MB in the end (delta: 564.4 kB). Peak memory consumption was 2.1 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 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 23, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/1.6; [L23] COND FALSE !(x1 != x) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 229.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 16.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.2ms SsaConstructionTime, 35.0ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2021-10-24 10:01:19,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/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-e943c26 [2021-10-24 10:01:22,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:01:22,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:01:22,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:01:22,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:01:22,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:01:22,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:01:22,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:01:22,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:01:22,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:01:22,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:01:22,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:01:22,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:01:22,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:01:22,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:01:22,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:01:22,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:01:22,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:01:22,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:01:22,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:01:22,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:01:22,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:01:22,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:01:22,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:01:22,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:01:22,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:01:22,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:01:22,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:01:22,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:01:22,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:01:22,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:01:22,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:01:22,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:01:22,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:01:22,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:01:22,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:01:22,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:01:22,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:01:22,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:01:22,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:01:22,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:01:22,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:01:22,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:01:22,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:01:22,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:01:22,497 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:01:22,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:01:22,498 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:01:22,498 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:01:22,498 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:01:22,498 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:01:22,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:01:22,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:01:22,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:01:22,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:01:22,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:01:22,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:01:22,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:01:22,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:01:22,503 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:01:22,503 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:01:22,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:01:22,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:01:22,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:01:22,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:01:22,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:01:22,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:01:22,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:01:22,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:01:22,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:01:22,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:01:22,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:01:22,506 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:01:22,506 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:01:22,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:01:22,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:01:22,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:01:22,507 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-10-24 10:01:22,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:01:22,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:01:22,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:01:23,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:01:23,002 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:01:23,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-10-24 10:01:23,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/4714c40d7/a78758219e5043b4bf648ce46631d8d1/FLAGf4134b69b [2021-10-24 10:01:23,602 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:01:23,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-10-24 10:01:23,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/4714c40d7/a78758219e5043b4bf648ce46631d8d1/FLAGf4134b69b [2021-10-24 10:01:23,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/data/4714c40d7/a78758219e5043b4bf648ce46631d8d1 [2021-10-24 10:01:23,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:01:23,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:01:23,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:01:23,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:01:23,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:01:23,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:01:23" (1/1) ... [2021-10-24 10:01:23,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6206bb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:23, skipping insertion in model container [2021-10-24 10:01:23,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:01:23" (1/1) ... [2021-10-24 10:01:23,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:01:23,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:01:24,142 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-10-24 10:01:24,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:01:24,179 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:01:24,201 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_fb90682a-791c-4af6-84d6-5634fe3eaea8/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-10-24 10:01:24,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:01:24,229 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:01:24,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24 WrapperNode [2021-10-24 10:01:24,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:01:24,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:01:24,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:01:24,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:01:24,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:01:24,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:01:24,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:01:24,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:01:24,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:01:24,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:01:24,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:01:24,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:01:24,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (1/1) ... [2021-10-24 10:01:24,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:01:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:01:24,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:01:24,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:01:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:01:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:01:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:01:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:01:29,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:01:29,086 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:01:29,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:01:29 BoogieIcfgContainer [2021-10-24 10:01:29,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:01:29,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:01:29,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:01:29,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:01:29,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:01:23" (1/3) ... [2021-10-24 10:01:29,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47323367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:01:29, skipping insertion in model container [2021-10-24 10:01:29,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:01:24" (2/3) ... [2021-10-24 10:01:29,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47323367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:01:29, skipping insertion in model container [2021-10-24 10:01:29,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:01:29" (3/3) ... [2021-10-24 10:01:29,099 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-10-24 10:01:29,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:01:29,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:01:29,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:01:29,169 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, mAutomataTypeConcurrency=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 [2021-10-24 10:01:29,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:01:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-10-24 10:01:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:01:29,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:01:29,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:01:29,203 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:01:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:01:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-24 10:01:29,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:01:29,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886554971] [2021-10-24 10:01:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:01:29,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:01:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:01:29,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:01:29,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:01:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:01:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:01:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:01:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:01:36,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:01:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:01:45,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:01:45,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886554971] [2021-10-24 10:01:45,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886554971] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:01:45,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:01:45,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 10:01:45,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782271227] [2021-10-24 10:01:45,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:01:45,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:01:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:01:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-24 10:01:45,194 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-10-24 10:01:48,343 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (= (fp.div roundNearestTiesToEven c_ULTIMATE.start_main_~x~0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-24 10:01:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:01:54,941 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-10-24 10:01:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:01:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 6 [2021-10-24 10:01:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:01:54,951 INFO L225 Difference]: With dead ends: 20 [2021-10-24 10:01:54,951 INFO L226 Difference]: Without dead ends: 8 [2021-10-24 10:01:54,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10693.5ms TimeCoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2021-10-24 10:01:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-24 10:01:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-24 10:01:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-24 10:01:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-24 10:01:54,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-24 10:01:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:01:54,981 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-24 10:01:54,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-10-24 10:01:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-24 10:01:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:01:54,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:01:54,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:01:55,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:01:55,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:01:55,196 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:01:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:01:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-10-24 10:01:55,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:01:55,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772072201] [2021-10-24 10:01:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:01:55,198 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:01:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:01:55,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:01:55,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:01:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:01:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:01:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:02:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:02:16,818 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) is different from false [2021-10-24 10:02:18,981 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) is different from true [2021-10-24 10:02:25,780 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-10-24 10:02:28,054 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-10-24 10:02:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-24 10:02:28,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:02:28,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772072201] [2021-10-24 10:02:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772072201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:02:28,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619652285] [2021-10-24 10:02:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:28,056 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:02:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:02:28,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:02:28,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-24 10:02:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:02:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:02:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:02:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:02:37,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:02:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-24 10:02:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1619652285] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:02:45,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808596502] [2021-10-24 10:02:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:02:45,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:02:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:02:45,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:02:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:03:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:03:03,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:03:03,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:03:12,472 WARN L207 SmtUtils]: Spent 5.13 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:03:26,875 WARN L207 SmtUtils]: Spent 9.28 s on a formula simplification that was a NOOP. DAG size: 14 [2021-10-24 10:03:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:03:26,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:03:43,093 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-10-24 10:03:45,247 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-10-24 10:03:50,465 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:03:57,591 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-10-24 10:03:59,901 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-10-24 10:03:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-24 10:03:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808596502] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:03:59,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:03:59,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 13 [2021-10-24 10:03:59,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435021736] [2021-10-24 10:03:59,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 10:03:59,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:03:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 10:03:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=63, Unknown=9, NotChecked=76, Total=182 [2021-10-24 10:03:59,908 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2021-10-24 10:04:02,248 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse2))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))) (and (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) .cse1) .cse1 (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-10-24 10:04:04,408 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) c_ULTIMATE.start_main_~x1~0)))) (and .cse0 (= c_ULTIMATE.start_main_~x1~0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1)) (or .cse0 (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-10-24 10:04:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:04:15,979 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-24 10:04:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:04:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 7 [2021-10-24 10:04:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:04:15,981 INFO L225 Difference]: With dead ends: 14 [2021-10-24 10:04:15,981 INFO L226 Difference]: Without dead ends: 10 [2021-10-24 10:04:15,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52939.4ms TimeCoverageRelationStatistics Valid=44, Invalid=79, Unknown=11, NotChecked=138, Total=272 [2021-10-24 10:04:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-24 10:04:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-24 10:04:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-10-24 10:04:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-24 10:04:15,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-24 10:04:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:04:15,986 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-24 10:04:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2021-10-24 10:04:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-24 10:04:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:04:15,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:04:15,988 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-24 10:04:16,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:04:16,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:04:16,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-24 10:04:16,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:04:16,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:04:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:04:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-10-24 10:04:16,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:04:16,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571972719] [2021-10-24 10:04:16,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:04:16,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:04:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:04:16,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:04:16,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:04:19,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:04:19,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:04:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:04:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:04:30,358 WARN L207 SmtUtils]: Spent 5.17 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:04:32,642 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x1~0 (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-24 10:04:38,554 WARN L207 SmtUtils]: Spent 5.90 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:04:52,377 WARN L207 SmtUtils]: Spent 9.41 s on a formula simplification that was a NOOP. DAG size: 13 [2021-10-24 10:05:03,014 WARN L207 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:05:20,840 WARN L207 SmtUtils]: Spent 11.67 s on a formula simplification that was a NOOP. DAG size: 16 [2021-10-24 10:05:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-24 10:05:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:05:34,050 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-10-24 10:05:36,201 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-10-24 10:05:46,376 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-24 10:05:48,674 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-10-24 10:05:50,979 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-10-24 10:05:56,469 WARN L207 SmtUtils]: Spent 5.48 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:06:02,295 WARN L207 SmtUtils]: Spent 5.83 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:06:04,738 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-10-24 10:06:07,177 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-10-24 10:06:13,735 WARN L207 SmtUtils]: Spent 6.54 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:06:19,988 WARN L207 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:06:22,620 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-10-24 10:06:25,254 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-10-24 10:06:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-10-24 10:06:25,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:06:25,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571972719] [2021-10-24 10:06:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571972719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:06:25,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [263296433] [2021-10-24 10:06:25,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:06:25,255 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:06:25,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:06:25,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:06:25,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-24 10:06:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:06:29,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:06:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:06:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:06:36,274 WARN L207 SmtUtils]: Spent 5.14 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:06:42,003 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:06:51,835 WARN L207 SmtUtils]: Spent 6.31 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:06:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-24 10:06:54,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:07:12,522 WARN L207 SmtUtils]: Spent 5.13 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-24 10:07:17,948 WARN L207 SmtUtils]: Spent 5.42 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:07:23,694 WARN L207 SmtUtils]: Spent 5.74 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:07:30,040 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:07:36,057 WARN L207 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:07:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-10-24 10:07:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [263296433] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:07:36,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6755771] [2021-10-24 10:07:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:07:36,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:07:36,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:07:36,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:07:36,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-24 10:09:48,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:09:48,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:09:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 10:09:48,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:10:05,057 WARN L207 SmtUtils]: Spent 5.77 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:10:33,188 WARN L207 SmtUtils]: Spent 12.17 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-24 10:10:42,217 WARN L207 SmtUtils]: Spent 6.54 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-24 10:10:47,754 WARN L207 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 10 DAG size of output: 1 [2021-10-24 10:10:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 3 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-24 10:10:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:11:01,914 WARN L838 $PredicateComparison]: unable to prove that (or (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0) (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-10-24 10:11:04,078 WARN L860 $PredicateComparison]: unable to prove that (or (fp.eq c_ULTIMATE.start_main_~x1~0 c_ULTIMATE.start_main_~x~0) (not (fp.eq (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) c_ULTIMATE.start_main_~x1~0)) (fp.eq c_ULTIMATE.start_main_~x1~0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-10-24 10:11:14,407 WARN L207 SmtUtils]: Spent 5.33 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-24 10:11:19,694 WARN L207 SmtUtils]: Spent 5.29 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-24 10:11:21,992 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 c_ULTIMATE.start_main_~x1~0) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-10-24 10:11:24,309 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 c_ULTIMATE.start_main_~x1~0) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-10-24 10:11:30,364 WARN L207 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 7 [2021-10-24 10:11:36,055 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:11:42,001 WARN L207 SmtUtils]: Spent 5.95 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-24 10:11:44,479 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-10-24 10:11:46,953 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~x1~0 .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-10-24 10:11:53,481 WARN L207 SmtUtils]: Spent 6.51 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:11:59,797 WARN L207 SmtUtils]: Spent 6.32 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-24 10:12:01,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 15143 column 7: push canceled [2021-10-24 10:12:01,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:12:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6, 8] total 13 [2021-10-24 10:12:01,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819173727] [2021-10-24 10:12:01,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 10:12:01,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:12:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 10:12:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=57, Unknown=24, NotChecked=184, Total=306 [2021-10-24 10:12:01,814 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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) [2021-10-24 10:12:11,932 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-24 10:12:12,704 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-24 10:12:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:12:12,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-24 10:12:12,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:12:13,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:12:13,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-24 10:12:13,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:12:13,306 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:851) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-10-24 10:12:13,310 INFO L168 Benchmark]: Toolchain (without parser) took 649355.89 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 42.4 MB in the beginning and 57.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:12:13,311 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 62.9 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:12:13,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.36 ms. Allocated memory is still 62.9 MB. Free memory was 42.2 MB in the beginning and 32.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:12:13,312 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.95 ms. Allocated memory is still 62.9 MB. Free memory was 32.2 MB in the beginning and 45.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:12:13,313 INFO L168 Benchmark]: Boogie Preprocessor took 58.59 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:12:13,313 INFO L168 Benchmark]: RCFGBuilder took 4731.07 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 35.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:12:13,314 INFO L168 Benchmark]: TraceAbstraction took 644218.28 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 35.1 MB in the beginning and 57.7 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:12:13,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 62.9 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.36 ms. Allocated memory is still 62.9 MB. Free memory was 42.2 MB in the beginning and 32.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.95 ms. Allocated memory is still 62.9 MB. Free memory was 32.2 MB in the beginning and 45.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.59 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 4731.07 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 35.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 644218.28 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 35.1 MB in the beginning and 57.7 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb90682a-791c-4af6-84d6-5634fe3eaea8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...