./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P --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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:48:11,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:48:11,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:48:11,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:48:11,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:48:11,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:48:11,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:48:11,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:48:11,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:48:11,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:48:11,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:48:11,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:48:11,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:48:11,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:48:11,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:48:11,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:48:11,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:48:11,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:48:11,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:48:12,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:48:12,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:48:12,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:48:12,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:48:12,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:48:12,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:48:12,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:48:12,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:48:12,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:48:12,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:48:12,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:48:12,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:48:12,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:48:12,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:48:12,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:48:12,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:48:12,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:48:12,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:48:12,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:48:12,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:48:12,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:48:12,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:48:12,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:48:12,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:48:12,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:48:12,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:48:12,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:48:12,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:48:12,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:48:12,084 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:48:12,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:48:12,084 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:48:12,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:48:12,085 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:48:12,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:48:12,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:48:12,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:48:12,086 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:48:12,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:48:12,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:48:12,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:48:12,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:48:12,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:48:12,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:48:12,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:48:12,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:48:12,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:48:12,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:48:12,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:48:12,090 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:48:12,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:48:12,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:48:12,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:48:12,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:48:12,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:48:12,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:12,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:48:12,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:48:12,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:48:12,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:48:12,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:48:12,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:48:12,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:48:12,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:48:12,093 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-20 22:48:12,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:48:12,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:48:12,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:48:12,410 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:48:12,412 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:48:12,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:12,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/2e54a82fa/b3f2b998927c480aaf2f9c0b31fbf3c1/FLAG24ac8e06b [2021-11-20 22:48:12,993 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:48:12,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:13,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/2e54a82fa/b3f2b998927c480aaf2f9c0b31fbf3c1/FLAG24ac8e06b [2021-11-20 22:48:13,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/2e54a82fa/b3f2b998927c480aaf2f9c0b31fbf3c1 [2021-11-20 22:48:13,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:48:13,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:48:13,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:13,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:48:13,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:48:13,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed56b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13, skipping insertion in model container [2021-11-20 22:48:13,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:48:13,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:48:13,596 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-20 22:48:13,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:13,608 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:48:13,622 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-20 22:48:13,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:13,635 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:13,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13 WrapperNode [2021-11-20 22:48:13,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:13,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:13,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:13,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:13,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,662 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2021-11-20 22:48:13,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:13,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:13,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:13,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:13,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:13,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:13,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:13,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:13,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (1/1) ... [2021-11-20 22:48:13,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:13,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:13,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:13,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:48:13,831 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:13,833 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:13,929 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:13,939 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:13,940 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:48:13,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:13 BoogieIcfgContainer [2021-11-20 22:48:13,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:13,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:13,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:13,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:13,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:48:13" (1/3) ... [2021-11-20 22:48:13,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc3449a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:13, skipping insertion in model container [2021-11-20 22:48:13,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:13" (2/3) ... [2021-11-20 22:48:13,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc3449a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:13, skipping insertion in model container [2021-11-20 22:48:13,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:13" (3/3) ... [2021-11-20 22:48:13,950 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:13,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:13,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:14,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:14,010 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 [2021-11-20 22:48:14,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:14,023 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) [2021-11-20 22:48:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 22:48:14,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:14,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 22:48:14,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1497591, now seen corresponding path program 1 times [2021-11-20 22:48:14,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:14,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783364637] [2021-11-20 22:48:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:14,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 22:48:14,124 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 22:48:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 22:48:14,152 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 22:48:14,154 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 22:48:14,155 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 22:48:14,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:48:14,161 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-20 22:48:14,164 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 22:48:14,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:48:14 BoogieIcfgContainer [2021-11-20 22:48:14,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 22:48:14,183 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 22:48:14,183 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 22:48:14,183 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 22:48:14,184 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:13" (3/4) ... [2021-11-20 22:48:14,187 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 22:48:14,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 22:48:14,188 INFO L158 Benchmark]: Toolchain (without parser) took 821.95ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 67.3MB in the beginning and 73.5MB in the end (delta: -6.1MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-11-20 22:48:14,189 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory was 55.3MB in the beginning and 55.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:48:14,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.51ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 67.1MB in the beginning and 98.6MB in the end (delta: -31.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 22:48:14,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.31ms. Allocated memory is still 123.7MB. Free memory was 98.6MB in the beginning and 97.7MB in the end (delta: 971.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:48:14,191 INFO L158 Benchmark]: Boogie Preprocessor took 16.99ms. Allocated memory is still 123.7MB. Free memory was 97.7MB in the beginning and 96.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:48:14,192 INFO L158 Benchmark]: RCFGBuilder took 260.36ms. Allocated memory is still 123.7MB. Free memory was 96.5MB in the beginning and 87.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 22:48:14,192 INFO L158 Benchmark]: TraceAbstraction took 238.80ms. Allocated memory is still 123.7MB. Free memory was 87.2MB in the beginning and 74.0MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 22:48:14,193 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 123.7MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:48:14,202 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 100.7MB. Free memory was 55.3MB in the beginning and 55.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.51ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 67.1MB in the beginning and 98.6MB in the end (delta: -31.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.31ms. Allocated memory is still 123.7MB. Free memory was 98.6MB in the beginning and 97.7MB in the end (delta: 971.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.99ms. Allocated memory is still 123.7MB. Free memory was 97.7MB in the beginning and 96.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.36ms. Allocated memory is still 123.7MB. Free memory was 96.5MB in the beginning and 87.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 238.80ms. Allocated memory is still 123.7MB. Free memory was 87.2MB in the beginning and 74.0MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 123.7MB. Free memory is still 73.5MB. 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: 27]: 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 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - 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 [2021-11-20 22:48:14,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/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_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P --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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:48:16,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:48:16,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:48:16,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:48:16,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:48:16,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:48:16,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:48:16,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:48:16,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:48:16,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:48:16,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:48:16,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:48:16,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:48:16,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:48:16,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:48:16,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:48:16,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:48:16,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:48:16,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:48:16,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:48:16,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:48:16,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:48:16,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:48:16,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:48:16,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:48:16,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:48:16,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:48:16,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:48:16,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:48:16,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:48:16,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:48:16,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:48:16,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:48:16,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:48:16,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:48:16,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:48:16,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:48:16,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:48:16,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:48:16,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:48:16,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:48:16,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 22:48:16,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:48:16,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:48:16,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:48:16,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:48:16,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:48:16,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:48:16,781 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:48:16,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:48:16,781 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:48:16,781 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:48:16,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:48:16,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:48:16,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:48:16,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:48:16,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:48:16,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:48:16,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:48:16,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:48:16,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:48:16,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:48:16,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:48:16,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:48:16,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:48:16,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:48:16,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:48:16,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:48:16,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:48:16,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:48:16,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:16,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:48:16,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:48:16,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:48:16,789 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:48:16,789 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:48:16,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:48:16,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:48:16,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:48:16,790 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-20 22:48:17,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:48:17,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:48:17,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:48:17,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:48:17,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:48:17,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:17,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/66046fc67/72869a9cc27b40d1b8f4bdbd0be22575/FLAGa73bf9170 [2021-11-20 22:48:17,851 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:48:17,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:17,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/66046fc67/72869a9cc27b40d1b8f4bdbd0be22575/FLAGa73bf9170 [2021-11-20 22:48:18,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/data/66046fc67/72869a9cc27b40d1b8f4bdbd0be22575 [2021-11-20 22:48:18,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:48:18,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:48:18,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:18,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:48:18,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:48:18,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5facf0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18, skipping insertion in model container [2021-11-20 22:48:18,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:48:18,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:48:18,362 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-20 22:48:18,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:18,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:48:18,393 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_a4532be9-f2f5-4c71-bddc-0e576f986fda/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-20 22:48:18,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:18,408 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:18,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18 WrapperNode [2021-11-20 22:48:18,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:18,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:18,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:18,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:18,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,443 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-11-20 22:48:18,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:18,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:18,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:18,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:18,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:18,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:18,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:18,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:18,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (1/1) ... [2021-11-20 22:48:18,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:18,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:18,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:18,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:48:18,615 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:18,616 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:22,357 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:22,362 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:22,363 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:48:22,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:22 BoogieIcfgContainer [2021-11-20 22:48:22,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:22,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:22,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:22,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:22,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:48:18" (1/3) ... [2021-11-20 22:48:22,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e8c02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:22, skipping insertion in model container [2021-11-20 22:48:22,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:18" (2/3) ... [2021-11-20 22:48:22,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e8c02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:22, skipping insertion in model container [2021-11-20 22:48:22,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:22" (3/3) ... [2021-11-20 22:48:22,372 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-20 22:48:22,378 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:22,378 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:22,424 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:22,431 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 [2021-11-20 22:48:22,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 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) [2021-11-20 22:48:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:48:22,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:22,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:48:22,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-11-20 22:48:22,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:48:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940771072] [2021-11-20 22:48:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:22,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:48:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:48:22,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:48:22,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:48:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:48:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:32,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:48:32,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940771072] [2021-11-20 22:48:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940771072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:32,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:48:32,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759423292] [2021-11-20 22:48:32,029 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:32,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:48:32,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:48:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:48:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:32,063 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 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) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-20 22:48:35,215 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div roundNearestTiesToEven |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-20 22:48:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:35,230 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-20 22:48:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:48:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:48:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:35,241 INFO L225 Difference]: With dead ends: 16 [2021-11-20 22:48:35,241 INFO L226 Difference]: Without dead ends: 7 [2021-11-20 22:48:35,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2021-11-20 22:48:35,248 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:35,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 1 Unchecked, 0.9s Time] [2021-11-20 22:48:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-20 22:48:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-20 22:48:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-11-20 22:48:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-20 22:48:35,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-20 22:48:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:35,278 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-20 22:48:35,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-20 22:48:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-20 22:48:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:48:35,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:35,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:48:35,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 22:48:35,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:48:35,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2021-11-20 22:48:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:48:35,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715083218] [2021-11-20 22:48:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:35,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:48:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:48:35,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:48:35,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:48:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:48:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:47,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:54,165 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from false [2021-11-20 22:48:56,288 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from true [2021-11-20 22:49:03,004 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 [2021-11-20 22:49:05,244 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 [2021-11-20 22:49:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 22:49:05,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715083218] [2021-11-20 22:49:05,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715083218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712236991] [2021-11-20 22:49:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:05,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:49:05,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:49:05,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:49:05,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-20 22:49:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:07,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:49:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:11,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 22:49:19,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712236991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511826016] [2021-11-20 22:49:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:19,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:19,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:49:19,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:50:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:50:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:18,078 WARN L227 SmtUtils]: Spent 6.98s 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) [2021-11-20 22:51:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:28,931 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-20 22:51:31,081 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-20 22:51:36,146 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:51:43,176 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-20 22:51:45,431 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-20 22:51:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 22:51:45,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511826016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:45,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:51:45,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 12 [2021-11-20 22:51:45,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315031854] [2021-11-20 22:51:45,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:51:45,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:51:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=47, Unknown=10, NotChecked=68, Total=156 [2021-11-20 22:51:45,435 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2021-11-20 22:51:47,711 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse2))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))) (and (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) .cse1) .cse1 (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-11-20 22:51:49,846 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) |c_ULTIMATE.start_main_~main__x1~0#1|)))) (and .cse0 (or .cse0 (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-20 22:51:51,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:54,150 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-20 22:51:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:51:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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 6 [2021-11-20 22:51:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:54,151 INFO L225 Difference]: With dead ends: 12 [2021-11-20 22:51:54,152 INFO L226 Difference]: Without dead ends: 9 [2021-11-20 22:51:54,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=41, Invalid=61, Unknown=12, NotChecked=126, Total=240 [2021-11-20 22:51:54,154 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:54,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 20 Unchecked, 3.6s Time] [2021-11-20 22:51:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-20 22:51:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-20 22:51:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-20 22:51:54,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-20 22:51:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:54,158 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-20 22:51:54,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2021-11-20 22:51:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-20 22:51:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:51:54,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:54,159 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2021-11-20 22:51:54,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:54,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:54,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-20 22:51:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:51:54,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 145055718, now seen corresponding path program 2 times [2021-11-20 22:51:54,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:54,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803043559] [2021-11-20 22:51:54,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:51:54,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:54,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:54,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:54,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:51:57,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:51:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:57,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:51:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:07,120 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:52:09,361 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~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 [2021-11-20 22:52:15,097 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:52:18,483 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_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-20 22:52:28,856 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:52:31,907 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse0)) (= (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_~main__x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-20 22:52:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 22:52:31,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:41,434 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-20 22:52:43,553 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-20 22:52:48,620 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:52:55,629 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_~main__x1~0#1| .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 [2021-11-20 22:52:57,868 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_~main__x1~0#1| .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 [2021-11-20 22:53:03,180 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:08,779 WARN L227 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:11,148 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_~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 [2021-11-20 22:53:13,538 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_~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 [2021-11-20 22:53:19,692 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:25,568 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:28,072 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 [2021-11-20 22:53:30,590 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 [2021-11-20 22:53:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 22:53:30,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:30,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803043559] [2021-11-20 22:53:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803043559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:30,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384731296] [2021-11-20 22:53:30,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:53:30,591 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:30,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:30,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-20 22:53:34,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:53:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:53:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:53:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:41,560 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:47,216 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:56,252 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:53:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 22:53:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:09,192 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:19,293 WARN L227 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:24,896 WARN L227 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:31,106 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:37,031 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 22:54:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384731296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770837771] [2021-11-20 22:54:37,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 22:54:37,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:37,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:37,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:57:00,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 22:57:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:57:00,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 22:57:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:07,954 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) [2021-11-20 22:57:17,108 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:57:39,656 WARN L227 SmtUtils]: Spent 11.61s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:49,048 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) [2021-11-20 22:57:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-20 22:57:49,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:05,023 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-20 22:58:10,185 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 6 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:58:15,330 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:58:22,484 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_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) (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 [2021-11-20 22:58:24,775 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_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) (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 [2021-11-20 22:58:30,492 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 7 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:58:35,901 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) [2021-11-20 22:58:41,630 WARN L227 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:58:44,067 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-20 22:58:46,500 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-20 22:58:52,846 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:58:58,904 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 11 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:59:05,248 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:59:07,829 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from false [2021-11-20 22:59:10,428 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from true [2021-11-20 22:59:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 22:59:10,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770837771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:59:10,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:59:10,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 17 [2021-11-20 22:59:10,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047936464] [2021-11-20 22:59:10,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:59:10,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 22:59:10,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 22:59:10,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=29, Unknown=21, NotChecked=220, Total=306 [2021-11-20 22:59:10,431 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:13,079 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1) (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-20 22:59:15,569 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2))) (.cse1 (fp.eq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 .cse1) (or (fp.eq .cse2 .cse3) .cse0 .cse1) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse4)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-20 22:59:18,176 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse3))) (let ((.cse1 (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (.cse2 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse3) .cse0)))) (and (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) .cse1 .cse2) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse3) .cse3)) (= c_currentRoundingMode roundNearestTiesToEven) (or .cse1 .cse2))))) is different from false [2021-11-20 22:59:20,502 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse3))) (let ((.cse1 (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (.cse2 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse3) .cse0)))) (and (or (fp.eq .cse0 |c_ULTIMATE.start_main_~main__x1~0#1|) .cse1 .cse2) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse3) .cse3)) (= c_currentRoundingMode roundNearestTiesToEven) (or .cse1 .cse2))))) is different from true [2021-11-20 22:59:23,121 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) |c_ULTIMATE.start_main_~main__x1~0#1|))) (.cse3 (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (and (= (fp.div c_currentRoundingMode .cse0 .cse1) |c_ULTIMATE.start_main_~main__x1~0#1|) (or .cse2 .cse3) (or .cse2 (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|) .cse3) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse1)) (= |c_ULTIMATE.start_main_~main__x~0#1| .cse0) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-20 22:59:26,740 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (or (fp.eq |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|))) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse0)) (= (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_~main__x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-20 22:59:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:26,809 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-20 22:59:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:59:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 22:59:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:26,810 INFO L225 Difference]: With dead ends: 13 [2021-11-20 22:59:26,810 INFO L226 Difference]: Without dead ends: 10 [2021-11-20 22:59:26,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.6s TimeCoverageRelationStatistics Valid=46, Invalid=33, Unknown=27, NotChecked=400, Total=506 [2021-11-20 22:59:26,813 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:26,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-20 22:59:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-20 22:59:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-20 22:59:26,816 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) [2021-11-20 22:59:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-20 22:59:26,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-11-20 22:59:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-20 22:59:26,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-20 22:59:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 22:59:26,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:26,819 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-20 22:59:26,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:27,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:27,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:27,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:27,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 3 times [2021-11-20 22:59:27,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:27,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238158383] [2021-11-20 22:59:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:59:27,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:27,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:27,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:59:31,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 22:59:31,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:59:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 22:59:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:55,647 WARN L227 SmtUtils]: Spent 7.69s 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) [2021-11-20 23:00:01,387 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:00:03,481 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_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-20 23:00:09,888 WARN L227 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:00:12,417 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~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 [2021-11-20 23:00:19,110 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 23:00:19,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238158383] [2021-11-20 23:00:19,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/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") [2021-11-20 23:00:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018146013] [2021-11-20 23:00:19,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:00:19,114 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:00:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:00:19,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:00:19,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 23:00:19,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 23:00:25,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:00:25,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:00:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:00:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:25,837 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-20 23:00:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190299223] [2021-11-20 23:00:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:00:25,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:00:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:00:25,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:00:25,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4532be9-f2f5-4c71-bddc-0e576f986fda/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process