./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7 --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 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:20:04,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:20:04,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:20:04,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:20:04,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:20:04,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:20:04,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:20:04,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:20:04,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:20:04,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:20:04,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:20:04,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:20:04,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:20:04,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:20:04,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:20:04,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:20:04,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:20:04,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:20:04,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:20:04,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:20:04,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:20:04,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:20:04,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:20:04,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:20:04,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:20:04,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:20:04,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:20:04,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:20:04,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:20:04,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:20:04,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:20:04,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:20:04,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:20:04,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:20:04,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:20:04,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:20:04,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:20:04,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:20:04,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:20:04,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:20:04,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:20:04,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:20:04,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:20:04,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:20:04,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:20:04,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:20:04,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:20:04,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:20:04,181 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:20:04,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:20:04,181 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:20:04,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:20:04,182 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:20:04,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:20:04,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:20:04,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:20:04,183 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:20:04,184 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:20:04,184 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:20:04,184 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:20:04,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:20:04,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:20:04,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:20:04,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:20:04,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:20:04,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:20:04,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:20:04,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:20:04,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:20:04,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:20:04,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:20:04,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:20:04,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:20:04,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:20:04,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:04,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:20:04,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:20:04,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:20:04,191 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:20:04,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:20:04,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:20:04,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:20:04,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:20:04,192 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-11-25 20:20:04,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:20:04,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:20:04,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:20:04,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:20:04,475 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:20:04,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-11-25 20:20:04,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/e9d5db657/a7659e8c66c346aa951b2b356aac7933/FLAG6371de7c9 [2021-11-25 20:20:04,991 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:20:04,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-11-25 20:20:04,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/e9d5db657/a7659e8c66c346aa951b2b356aac7933/FLAG6371de7c9 [2021-11-25 20:20:05,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/e9d5db657/a7659e8c66c346aa951b2b356aac7933 [2021-11-25 20:20:05,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:20:05,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:20:05,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:05,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:20:05,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:20:05,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192f079b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05, skipping insertion in model container [2021-11-25 20:20:05,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:20:05,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:20:05,571 WARN L230 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-11-25 20:20:05,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:05,597 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:20:05,612 WARN L230 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-11-25 20:20:05,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:05,627 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:20:05,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05 WrapperNode [2021-11-25 20:20:05,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:05,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:05,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:20:05,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:20:05,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,658 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-11-25 20:20:05,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:05,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:20:05,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:20:05,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:20:05,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:20:05,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:20:05,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:20:05,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:20:05,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (1/1) ... [2021-11-25 20:20:05,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:05,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:20:05,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:20:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:20:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:20:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:20:05,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:20:05,817 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:20:05,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:20:05,924 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:20:05,962 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:20:05,963 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:20:05,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:05 BoogieIcfgContainer [2021-11-25 20:20:05,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:20:05,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:20:05,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:20:05,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:20:05,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:20:05" (1/3) ... [2021-11-25 20:20:05,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463a24ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:05, skipping insertion in model container [2021-11-25 20:20:05,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:05" (2/3) ... [2021-11-25 20:20:05,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463a24ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:05, skipping insertion in model container [2021-11-25 20:20:05,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:05" (3/3) ... [2021-11-25 20:20:05,972 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-11-25 20:20:05,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:20:05,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:20:06,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:20:06,030 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 [2021-11-25 20:20:06,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:20:06,043 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) [2021-11-25 20:20:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:20:06,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:06,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:20:06,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-25 20:20:06,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396371862] [2021-11-25 20:20:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:06,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:20:06,141 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:20:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:20:06,168 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:20:06,170 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:20:06,171 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:20:06,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:20:06,177 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 20:20:06,180 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:20:06,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:20:06 BoogieIcfgContainer [2021-11-25 20:20:06,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:20:06,198 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:20:06,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:20:06,198 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:20:06,198 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:05" (3/4) ... [2021-11-25 20:20:06,201 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:20:06,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:20:06,202 INFO L158 Benchmark]: Toolchain (without parser) took 799.84ms. Allocated memory is still 102.8MB. Free memory was 68.8MB in the beginning and 54.3MB in the end (delta: 14.5MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2021-11-25 20:20:06,203 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:20:06,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.50ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 78.7MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:20:06,204 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.36ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:20:06,205 INFO L158 Benchmark]: Boogie Preprocessor took 18.44ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 76.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:20:06,206 INFO L158 Benchmark]: RCFGBuilder took 287.12ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 67.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:20:06,206 INFO L158 Benchmark]: TraceAbstraction took 230.32ms. Allocated memory is still 102.8MB. Free memory was 66.9MB in the beginning and 54.6MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:20:06,207 INFO L158 Benchmark]: Witness Printer took 3.84ms. Allocated memory is still 102.8MB. Free memory was 54.6MB in the beginning and 54.3MB in the end (delta: 329.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:20:06,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.50ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 78.7MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.36ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.44ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 76.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.12ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 67.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 230.32ms. Allocated memory is still 102.8MB. Free memory was 66.9MB in the beginning and 54.6MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.84ms. Allocated memory is still 102.8MB. Free memory was 54.6MB in the beginning and 54.3MB in the end (delta: 329.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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; VAL [x=1] [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s 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 [2021-11-25 20:20:06,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7 --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 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:20:08,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:20:08,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:20:08,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:20:08,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:20:08,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:20:08,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:20:08,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:20:08,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:20:08,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:20:08,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:20:08,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:20:08,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:20:08,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:20:08,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:20:08,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:20:08,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:20:08,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:20:08,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:20:08,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:20:08,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:20:08,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:20:08,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:20:08,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:20:08,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:20:08,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:20:08,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:20:08,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:20:08,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:20:08,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:20:08,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:20:08,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:20:08,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:20:08,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:20:08,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:20:08,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:20:08,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:20:08,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:20:08,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:20:08,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:20:08,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:20:08,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:20:08,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:20:08,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:20:08,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:20:08,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:20:08,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:20:08,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:20:08,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:20:08,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:20:08,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:20:08,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:20:08,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:20:08,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:20:08,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:20:08,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:20:08,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:20:08,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:20:08,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:20:08,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:20:08,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:20:08,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:20:08,719 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:20:08,719 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:20:08,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:20:08,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:20:08,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:20:08,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:20:08,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:20:08,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:20:08,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:20:08,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:08,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:20:08,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:20:08,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:20:08,722 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:20:08,722 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:20:08,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:20:08,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:20:08,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:20:08,723 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-11-25 20:20:09,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:20:09,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:20:09,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:20:09,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:20:09,096 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:20:09,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-11-25 20:20:09,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/0c915e469/a861b0d307a74a7da32eb10cc3503e8c/FLAGd54bf4dea [2021-11-25 20:20:09,653 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:20:09,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-11-25 20:20:09,660 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/0c915e469/a861b0d307a74a7da32eb10cc3503e8c/FLAGd54bf4dea [2021-11-25 20:20:10,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/data/0c915e469/a861b0d307a74a7da32eb10cc3503e8c [2021-11-25 20:20:10,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:20:10,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:20:10,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:10,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:20:10,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:20:10,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abac340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10, skipping insertion in model container [2021-11-25 20:20:10,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:20:10,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:20:10,207 WARN L230 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-11-25 20:20:10,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:10,240 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:20:10,257 WARN L230 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_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i[808,821] [2021-11-25 20:20:10,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:10,292 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:20:10,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10 WrapperNode [2021-11-25 20:20:10,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:10,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:10,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:20:10,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:20:10,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,319 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-11-25 20:20:10,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:10,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:20:10,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:20:10,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:20:10,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:20:10,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:20:10,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:20:10,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:20:10,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (1/1) ... [2021-11-25 20:20:10,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:10,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:20:10,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:20:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:20:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:20:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:20:10,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:20:10,503 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:20:10,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:20:14,449 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:20:14,455 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:20:14,455 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:20:14,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:14 BoogieIcfgContainer [2021-11-25 20:20:14,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:20:14,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:20:14,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:20:14,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:20:14,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:20:10" (1/3) ... [2021-11-25 20:20:14,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffca1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:14, skipping insertion in model container [2021-11-25 20:20:14,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:10" (2/3) ... [2021-11-25 20:20:14,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffca1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:14, skipping insertion in model container [2021-11-25 20:20:14,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:14" (3/3) ... [2021-11-25 20:20:14,464 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-11-25 20:20:14,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:20:14,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:20:14,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:20:14,521 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 [2021-11-25 20:20:14,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:20:14,533 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) [2021-11-25 20:20:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:20:14,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:14,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:20:14,539 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-25 20:20:14,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:20:14,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631080967] [2021-11-25 20:20:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:14,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:20:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:20:14,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:20:14,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:20:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:20:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:20,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:20:20,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:20:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631080967] [2021-11-25 20:20:20,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631080967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:20,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:20,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:20,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329732642] [2021-11-25 20:20:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:20,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:20:20,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:20:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:20:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:20:20,970 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 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 20:20:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:28,071 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-25 20:20:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:20:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 [2021-11-25 20:20:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:28,081 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:20:28,082 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 20:20:28,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:28,089 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:28,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:20:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 20:20:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 20:20:28,120 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) [2021-11-25 20:20:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-25 20:20:28,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-25 20:20:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:28,122 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-25 20:20:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 20:20:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-25 20:20:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:20:28,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:28,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:28,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:28,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:20:28,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-11-25 20:20:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:20:28,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742739578] [2021-11-25 20:20:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:28,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:20:28,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:20:28,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:20:28,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:20:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:20:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:16,285 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 [2021-11-25 20:21:18,568 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 [2021-11-25 20:21:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:18,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:21:18,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742739578] [2021-11-25 20:21:18,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742739578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:18,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550402950] [2021-11-25 20:21:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:18,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:21:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:21:18,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:21:18,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-25 20:21:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:21:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:25,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550402950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:32,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381342029] [2021-11-25 20:21:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:32,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:32,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:32,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:21:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:21:50,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:01,207 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:22:18,349 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:18,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:41,817 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-25 20:22:43,955 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-25 20:22:50,447 WARN L227 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:22:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-25 20:22:54,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381342029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:54,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:22:54,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 12 [2021-11-25 20:22:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963867512] [2021-11-25 20:22:55,005 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:22:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:22:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:22:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=68, Unknown=18, NotChecked=38, Total=156 [2021-11-25 20:22:55,007 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-11-25 20:22:56,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:22:58,950 WARN L860 $PredicateComparison]: unable to prove that (and (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)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-25 20:23:01,102 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) |c_ULTIMATE.start_main_~x1~0#1|)))) (and (or .cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1)) .cse0 (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-25 20:23:04,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:10,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:12,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:14,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:17,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:19,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:23:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:19,532 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 20:23:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:23:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 [2021-11-25 20:23:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:19,533 INFO L225 Difference]: With dead ends: 14 [2021-11-25 20:23:19,533 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 20:23:19,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.0s TimeCoverageRelationStatistics Valid=42, Invalid=85, Unknown=21, NotChecked=92, Total=240 [2021-11-25 20:23:19,538 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:19,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 6 Unknown, 15 Unchecked, 16.6s Time] [2021-11-25 20:23:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 20:23:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 20:23:19,543 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) [2021-11-25 20:23:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-25 20:23:19,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-25 20:23:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:19,544 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-25 20:23:19,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-11-25 20:23:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-25 20:23:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:23:19,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:19,546 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:19,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:19,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:19,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:20,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:23:20,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-11-25 20:23:20,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:23:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595340186] [2021-11-25 20:23:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:23:20,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:23:20,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:23:20,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:23:20,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:23:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:23:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:23:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:23:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:34,842 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:23:37,142 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (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 [2021-11-25 20:23:42,819 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:23:58,655 WARN L227 SmtUtils]: Spent 9.20s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:08,244 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:24:28,142 WARN L227 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 20:24:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:37,299 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-25 20:24:39,438 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-25 20:24:49,413 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:24:51,701 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#1| .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 [2021-11-25 20:24:53,977 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#1| .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 [2021-11-25 20:24:59,372 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:05,004 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:07,443 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#1| .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 [2021-11-25 20:25:09,874 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#1| .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 [2021-11-25 20:25:16,159 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:22,147 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:24,693 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 [2021-11-25 20:25:27,253 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 [2021-11-25 20:25:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 20:25:27,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:25:27,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595340186] [2021-11-25 20:25:27,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595340186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:25:27,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737071885] [2021-11-25 20:25:27,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:25:27,255 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:25:27,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:25:27,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:25:27,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-25 20:25:31,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:25:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:25:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:25:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:25:39,036 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:44,742 WARN L227 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:55,072 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:25:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 20:25:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:12,276 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:26:17,695 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:26:23,349 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:26:29,673 WARN L227 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:26:35,686 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:26:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 20:26:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737071885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:35,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294406919] [2021-11-25 20:26:35,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:26:35,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:26:35,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:35,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:26:35,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:27:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:27:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:27:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:27:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:13,735 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:19,457 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:30,050 WARN L227 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 20:27:30,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:46,222 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:51,638 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:57,356 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:28:03,703 WARN L227 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:28:09,732 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:28:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 20:28:09,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294406919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:28:09,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:28:09,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6, 8, 6, 8] total 13 [2021-11-25 20:28:09,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056074207] [2021-11-25 20:28:09,733 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:28:09,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:28:09,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:28:09,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:28:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=48, Unknown=14, NotChecked=90, Total=182 [2021-11-25 20:28:09,735 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) [2021-11-25 20:28:11,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:15,060 WARN L860 $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 true [2021-11-25 20:28:17,665 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-25 20:28:20,096 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-25 20:28:22,703 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-25 20:28:25,335 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-25 20:28:27,505 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x1~0#1|) (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-25 20:28:29,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:28:30,195 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-25 20:28:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:28:30,196 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 9 [2021-11-25 20:28:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:28:30,197 INFO L225 Difference]: With dead ends: 15 [2021-11-25 20:28:30,197 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 20:28:30,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.6s TimeCoverageRelationStatistics Valid=38, Invalid=50, Unknown=20, NotChecked=198, Total=306 [2021-11-25 20:28:30,214 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:28:30,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 2 Unknown, 28 Unchecked, 5.4s Time] [2021-11-25 20:28:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 20:28:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 20:28:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2021-11-25 20:28:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-25 20:28:30,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-11-25 20:28:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:28:30,218 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-25 20:28:30,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-25 20:28:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-25 20:28:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:28:30,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:28:30,218 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:28:30,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:28:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:28:30,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:28:30,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:28:30,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:28:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:28:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 3 times [2021-11-25 20:28:30,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:28:30,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132102433] [2021-11-25 20:28:30,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:28:30,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:28:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:28:30,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:28:30,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:28:34,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:28:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:28:34,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:28:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:28:44,914 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:28:58,153 WARN L227 SmtUtils]: Spent 7.37s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:29:03,873 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:29:07,386 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-25 20:29:13,834 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:29:18,507 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-25 20:29:23,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-25 20:29:23,672 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 20:29:23,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:29:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132102433] [2021-11-25 20:29:23,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/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") [2021-11-25 20:29:23,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1414844861] [2021-11-25 20:29:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:29:23,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:29:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:29:23,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:29:23,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 20:29:29,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:29:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:29:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:29:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:29,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-25 20:29:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003167881] [2021-11-25 20:29:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:29:29,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:29,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:30,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:33:21,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:33:21,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:21,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:33:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:21,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-25 20:33:21,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:33:21,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 20:33:21,917 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-25 20:33:21,917 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 20:33:21,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:33:22,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-25 20:33:22,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:22,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_737cc63f-cb9e-4fc8-b9a8-3f4c64623cc6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:33:22,529 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-25 20:33:22,531 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:33:22,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:33:22 BoogieIcfgContainer [2021-11-25 20:33:22,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:33:22,540 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:33:22,540 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:33:22,540 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:33:22,541 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:14" (3/4) ... [2021-11-25 20:33:22,543 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:33:22,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:33:22,544 INFO L158 Benchmark]: Toolchain (without parser) took 792495.53ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 51.1MB in the beginning and 57.4MB in the end (delta: -6.3MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-11-25 20:33:22,544 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:33:22,544 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.32ms. Allocated memory is still 69.2MB. Free memory was 50.9MB in the beginning and 51.4MB in the end (delta: -512.8kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:33:22,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.47ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 50.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:33:22,545 INFO L158 Benchmark]: Boogie Preprocessor took 47.03ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 48.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:33:22,546 INFO L158 Benchmark]: RCFGBuilder took 4088.28ms. Allocated memory is still 69.2MB. Free memory was 48.7MB in the beginning and 40.9MB in the end (delta: 7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 20:33:22,546 INFO L158 Benchmark]: TraceAbstraction took 788081.22ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 40.4MB in the beginning and 58.1MB in the end (delta: -17.7MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-25 20:33:22,546 INFO L158 Benchmark]: Witness Printer took 2.90ms. Allocated memory is still 92.3MB. Free memory was 58.1MB in the beginning and 57.4MB in the end (delta: 678.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:33:22,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.32ms. Allocated memory is still 69.2MB. Free memory was 50.9MB in the beginning and 51.4MB in the end (delta: -512.8kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.47ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 50.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.03ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 48.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 4088.28ms. Allocated memory is still 69.2MB. Free memory was 48.7MB in the beginning and 40.9MB in the end (delta: 7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 788081.22ms. Allocated memory was 69.2MB in the beginning and 92.3MB in the end (delta: 23.1MB). Free memory was 40.4MB in the beginning and 58.1MB in the end (delta: -17.7MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Witness Printer took 2.90ms. Allocated memory is still 92.3MB. Free memory was 58.1MB in the beginning and 57.4MB in the end (delta: 678.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/1.6; [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND TRUE x1 != x [L25] x = x1 [L26] x1 = x/1.6 [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 788.0s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 52.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 24.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 22.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43 IncrementalHoareTripleChecker+Unchecked, 31 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37 IncrementalHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 17 mSDtfsCounter, 37 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 165.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 63.0s SatisfiabilityAnalysisTime, 432.2s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 1089 SizeOfPredicates, 25 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN