./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:09:46,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:09:46,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:09:46,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:09:46,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:09:47,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:09:47,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:09:47,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:09:47,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:09:47,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:09:47,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:09:47,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:09:47,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:09:47,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:09:47,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:09:47,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:09:47,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:09:47,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:09:47,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:09:47,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:09:47,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:09:47,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:09:47,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:09:47,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:09:47,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:09:47,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:09:47,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:09:47,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:09:47,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:09:47,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:09:47,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:09:47,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:09:47,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:09:47,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:09:47,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:09:47,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:09:47,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:09:47,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:09:47,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:09:47,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:09:47,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:09:47,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:09:47,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:09:47,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:09:47,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:09:47,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:09:47,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:09:47,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:09:47,124 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:09:47,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:09:47,125 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:09:47,125 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:09:47,126 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:09:47,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:09:47,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:09:47,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:09:47,127 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:09:47,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:09:47,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:09:47,128 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:09:47,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:09:47,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:09:47,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:09:47,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:09:47,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:09:47,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:09:47,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:09:47,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:09:47,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:09:47,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:09:47,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:09:47,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:09:47,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:09:47,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:09:47,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:47,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:09:47,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:09:47,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:09:47,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:09:47,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:09:47,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:09:47,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:09:47,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:09:47,135 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_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2021-11-25 19:09:47,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:09:47,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:09:47,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:09:47,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:09:47,483 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:09:47,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:47,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/f0839fa92/fb071ff42c1a45df8569e7d8200f6f67/FLAG229492143 [2021-11-25 19:09:48,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:09:48,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:48,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/f0839fa92/fb071ff42c1a45df8569e7d8200f6f67/FLAG229492143 [2021-11-25 19:09:48,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/f0839fa92/fb071ff42c1a45df8569e7d8200f6f67 [2021-11-25 19:09:48,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:09:48,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:09:48,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:48,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:09:48,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:09:48,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d779bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48, skipping insertion in model container [2021-11-25 19:09:48,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:09:48,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:09:48,628 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_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2021-11-25 19:09:48,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:48,652 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:09:48,696 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_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2021-11-25 19:09:48,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:48,729 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:09:48,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48 WrapperNode [2021-11-25 19:09:48,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:48,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:48,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:09:48,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:09:48,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,789 INFO L137 Inliner]: procedures = 18, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2021-11-25 19:09:48,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:48,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:09:48,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:09:48,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:09:48,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:09:48,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:09:48,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:09:48,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:09:48,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (1/1) ... [2021-11-25 19:09:48,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:48,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:09:48,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:09:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:09:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:09:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:09:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-25 19:09:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:09:48,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:09:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-25 19:09:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:09:49,014 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:09:49,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:09:49,181 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:09:49,192 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:09:49,192 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:09:49,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:49 BoogieIcfgContainer [2021-11-25 19:09:49,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:09:49,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:09:49,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:09:49,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:09:49,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:09:48" (1/3) ... [2021-11-25 19:09:49,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9b60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:49, skipping insertion in model container [2021-11-25 19:09:49,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:48" (2/3) ... [2021-11-25 19:09:49,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9b60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:49, skipping insertion in model container [2021-11-25 19:09:49,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:49" (3/3) ... [2021-11-25 19:09:49,202 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:49,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:09:49,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:09:49,252 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:09:49,259 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:09:49,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:09:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:09:49,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:49,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:49,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1054039300, now seen corresponding path program 1 times [2021-11-25 19:09:49,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:49,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372801694] [2021-11-25 19:09:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:49,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:49,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372801694] [2021-11-25 19:09:49,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372801694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:49,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:49,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:09:49,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199560810] [2021-11-25 19:09:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:49,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:09:49,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:09:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:09:49,580 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:49,655 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2021-11-25 19:09:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:09:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-25 19:09:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:49,667 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:09:49,671 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:09:49,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:09:49,691 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:49,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 87 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:09:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:09:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 19:09:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-25 19:09:49,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-11-25 19:09:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:49,752 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-25 19:09:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-25 19:09:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:09:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:49,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:09:49,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1037028639, now seen corresponding path program 1 times [2021-11-25 19:09:49,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:49,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682187142] [2021-11-25 19:09:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:49,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:09:49,782 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:09:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:09:49,822 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:09:49,822 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:09:49,824 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:09:49,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:09:49,835 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-25 19:09:49,842 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:09:49,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:09:49 BoogieIcfgContainer [2021-11-25 19:09:49,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:09:49,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:09:49,878 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:09:49,878 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:09:49,878 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:49" (3/4) ... [2021-11-25 19:09:49,881 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:09:49,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:09:49,883 INFO L158 Benchmark]: Toolchain (without parser) took 1489.83ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 73.3MB in the beginning and 82.7MB in the end (delta: -9.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-25 19:09:49,883 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 69.1MB in the end (delta: 18.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:09:49,884 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.03ms. Allocated memory is still 94.4MB. Free memory was 73.1MB in the beginning and 67.8MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 19:09:49,885 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.53ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 65.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:09:49,885 INFO L158 Benchmark]: Boogie Preprocessor took 44.86ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 64.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:09:49,886 INFO L158 Benchmark]: RCFGBuilder took 358.24ms. Allocated memory is still 94.4MB. Free memory was 64.4MB in the beginning and 52.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:09:49,887 INFO L158 Benchmark]: TraceAbstraction took 680.28ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 51.8MB in the beginning and 82.7MB in the end (delta: -30.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:09:49,887 INFO L158 Benchmark]: Witness Printer took 4.21ms. Allocated memory is still 113.2MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:09:49,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 69.1MB in the end (delta: 18.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.03ms. Allocated memory is still 94.4MB. Free memory was 73.1MB in the beginning and 67.8MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.53ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 65.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.86ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 64.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 358.24ms. Allocated memory is still 94.4MB. Free memory was 64.4MB in the beginning and 52.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 680.28ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 51.8MB in the beginning and 82.7MB in the end (delta: -30.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.21ms. Allocated memory is still 113.2MB. Free memory is still 82.7MB. 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: 51]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 36. Possible FailurePath: [L1] int __return_main; [L12] int __return_132; [L15] int main__i; [L16] float main__z; [L17] float main__t; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L20] main__t = __VERIFIER_nondet_float() [L21] int main____CPAchecker_TMP_0; [L22] EXPR main__min[0] VAL [__return_132=0, __return_main=0, main__max={5:0}, main__min={4:0}, main__min[0]=50] [L22] COND TRUE main__t >= (main__min[0]) [L24] EXPR main__max[4UL] VAL [__return_132=0, __return_main=0, main__max={5:0}, main__max[4UL]=51, main__min={4:0}] [L24] COND TRUE main__t <= (main__max[4UL]) [L26] main____CPAchecker_TMP_0 = 1 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__max={5:0}, main__min={4:0}] [L27] COND TRUE main____CPAchecker_TMP_0 != 0 [L29] main__i = 0 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L30] COND TRUE main__i < 5UL [L32] EXPR main__max[main__i] VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__max[main__i]=49, main__min={4:0}] [L32] COND TRUE main__t <= (main__max[main__i]) [L36] EXPR main__min[main__i] [L36] EXPR main__max[main__i] [L36] EXPR main__min[main__i] [L36] main__z = (main__t - (main__min[main__i])) / ((main__max[main__i]) - (main__min[main__i])) [L37] int main____CPAchecker_TMP_1; VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L38] COND FALSE !(main__z >= 0.0) VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L64] main____CPAchecker_TMP_1 = 0 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L45] int __tmp_1; [L46] __tmp_1 = main____CPAchecker_TMP_1 [L47] int __VERIFIER_assert__cond; [L48] __VERIFIER_assert__cond = __tmp_1 VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L49] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L51] reach_error() VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 87 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 29 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 19:09:49,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:09:52,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:09:52,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:09:52,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:09:52,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:09:52,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:09:52,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:09:52,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:09:52,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:09:52,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:09:52,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:09:52,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:09:52,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:09:52,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:09:52,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:09:52,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:09:52,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:09:52,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:09:52,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:09:52,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:09:52,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:09:52,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:09:52,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:09:52,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:09:52,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:09:52,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:09:52,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:09:52,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:09:52,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:09:52,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:09:52,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:09:52,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:09:52,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:09:52,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:09:52,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:09:52,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:09:52,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:09:52,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:09:52,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:09:52,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:09:52,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:09:52,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:09:52,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:09:52,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:09:52,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:09:52,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:09:52,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:09:52,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:09:52,475 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:09:52,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:09:52,476 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:09:52,476 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:09:52,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:09:52,476 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:09:52,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:09:52,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:09:52,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:09:52,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:09:52,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:09:52,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:09:52,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:09:52,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:09:52,478 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:09:52,478 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:09:52,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:09:52,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:09:52,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:09:52,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:09:52,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:09:52,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:09:52,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:09:52,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:52,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:09:52,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:09:52,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:09:52,481 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:09:52,481 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:09:52,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:09:52,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:09:52,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:09:52,482 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_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2021-11-25 19:09:52,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:09:52,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:09:52,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:09:52,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:09:52,857 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:09:52,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:52,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/b608f9ddd/4cf804572e2545f8af4d029d30c26081/FLAG6f7c14974 [2021-11-25 19:09:53,497 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:09:53,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:53,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/b608f9ddd/4cf804572e2545f8af4d029d30c26081/FLAG6f7c14974 [2021-11-25 19:09:53,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/data/b608f9ddd/4cf804572e2545f8af4d029d30c26081 [2021-11-25 19:09:53,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:09:53,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:09:53,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:53,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:09:53,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:09:53,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:53" (1/1) ... [2021-11-25 19:09:53,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da82109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:53, skipping insertion in model container [2021-11-25 19:09:53,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:53" (1/1) ... [2021-11-25 19:09:53,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:09:53,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:09:54,031 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_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2021-11-25 19:09:54,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:54,064 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:09:54,126 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_48752df7-4018-480c-944f-9e3ebdea668f/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2021-11-25 19:09:54,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:54,148 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:09:54,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54 WrapperNode [2021-11-25 19:09:54,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:54,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:54,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:09:54,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:09:54,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,192 INFO L137 Inliner]: procedures = 19, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2021-11-25 19:09:54,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:54,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:09:54,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:09:54,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:09:54,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:09:54,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:09:54,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:09:54,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:09:54,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (1/1) ... [2021-11-25 19:09:54,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:54,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:09:54,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:09:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:09:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2021-11-25 19:09:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:09:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:09:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-11-25 19:09:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:09:54,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:09:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:09:54,421 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:09:54,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:09:57,096 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:09:57,103 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:09:57,103 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:09:57,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:57 BoogieIcfgContainer [2021-11-25 19:09:57,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:09:57,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:09:57,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:09:57,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:09:57,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:09:53" (1/3) ... [2021-11-25 19:09:57,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b5751e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:57, skipping insertion in model container [2021-11-25 19:09:57,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:54" (2/3) ... [2021-11-25 19:09:57,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b5751e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:57, skipping insertion in model container [2021-11-25 19:09:57,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:57" (3/3) ... [2021-11-25 19:09:57,113 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2021-11-25 19:09:57,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:09:57,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:09:57,165 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:09:57,172 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:09:57,172 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:09:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:09:57,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:57,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:57,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 775758574, now seen corresponding path program 1 times [2021-11-25 19:09:57,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:57,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284008683] [2021-11-25 19:09:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:57,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:57,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:57,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:09:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:09:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:57,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:57,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:57,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284008683] [2021-11-25 19:09:57,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284008683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:57,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:57,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:09:57,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514897306] [2021-11-25 19:09:57,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:57,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:57,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:57,764 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:59,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:59,548 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-25 19:09:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:09:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:59,559 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:09:59,559 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:09:59,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:09:59,565 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:59,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 19:09:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:09:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 19:09:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-25 19:09:59,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2021-11-25 19:09:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:59,609 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-25 19:09:59,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-25 19:09:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:09:59,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:59,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:59,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 19:09:59,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:59,829 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 792769235, now seen corresponding path program 1 times [2021-11-25 19:09:59,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613585844] [2021-11-25 19:09:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:59,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:59,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:59,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:10:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:10:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:02,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:10:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 86 [2021-11-25 19:10:17,093 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_2 (_ BitVec 32))) (= (fp ((_ extract 31 31) v_arrayElimCell_2) ((_ extract 30 23) v_arrayElimCell_2) ((_ extract 22 0) v_arrayElimCell_2)) ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32)))) (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1)))) (and (= .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32))) (= .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse0 .cse1))) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse1)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-25 19:11:07,822 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from false [2021-11-25 19:11:09,842 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from true [2021-11-25 19:13:26,414 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from false [2021-11-25 19:13:28,436 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from true [2021-11-25 19:13:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:13:28,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:13:28,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613585844] [2021-11-25 19:13:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613585844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:28,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:28,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:13:28,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247349495] [2021-11-25 19:13:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:13:28,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:13:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:13:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=47, Unknown=5, NotChecked=48, Total=132 [2021-11-25 19:13:28,442 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:13:30,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:13,893 WARN L227 SmtUtils]: Spent 33.55s on a formula simplification. DAG size of input: 81 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:14:16,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:17,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:14:17,931 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-25 19:14:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:14:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:14:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:14:17,933 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:14:17,933 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:14:17,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=38, Invalid=56, Unknown=8, NotChecked=54, Total=156 [2021-11-25 19:14:17,935 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:14:17,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 1 Unknown, 70 Unchecked, 6.2s Time] [2021-11-25 19:14:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:14:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 19:14:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-25 19:14:17,942 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 13 [2021-11-25 19:14:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:14:17,943 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-25 19:14:17,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:14:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-25 19:14:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:14:17,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:17,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:14:17,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 19:14:18,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:14:18,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:14:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1710804433, now seen corresponding path program 1 times [2021-11-25 19:14:18,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:14:18,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759241619] [2021-11-25 19:14:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:18,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:14:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:14:18,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:14:18,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:14:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:14:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:14:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:21,035 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:14:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 86 [2021-11-25 19:15:11,556 WARN L227 SmtUtils]: Spent 13.55s on a formula simplification. DAG size of input: 39 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:15:51,565 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub c_currentRoundingMode .cse1 .cse0))) (= .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse0) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0)))) (fp.geq ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~main__z~0#1|) (_ +zero 11 53)) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-25 19:17:04,005 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse2))))) is different from false [2021-11-25 19:17:06,060 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse2))))) is different from true [2021-11-25 19:19:37,261 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1))))) is different from false [2021-11-25 19:19:39,317 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1))))) is different from true [2021-11-25 19:20:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:20:55,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:20:55,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:20:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759241619] [2021-11-25 19:20:55,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759241619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:55,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:55,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 19:20:55,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505577169] [2021-11-25 19:20:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:55,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:20:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:20:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:20:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=56, Unknown=11, NotChecked=54, Total=156 [2021-11-25 19:20:55,954 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:20:57,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:59,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:01,692 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#main__max~0#1.base|)) (.cse5 (let ((.cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#main__min~0#1.base|) |c_ULTIMATE.start_main_~#main__min~0#1.offset|))) (fp ((_ extract 31 31) .cse7) ((_ extract 30 23) .cse7) ((_ extract 22 0) .cse7))))) (and (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub c_currentRoundingMode .cse1 .cse0))) (= .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse0) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0)))) (fp.leq |c_ULTIMATE.start_main_~main__t~0#1| (let ((.cse2 (select .cse3 (bvadd (bvmul |c_ULTIMATE.start_main_~main__i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~#main__max~0#1.offset|)))) (fp ((_ extract 31 31) .cse2) ((_ extract 30 23) .cse2) ((_ extract 22 0) .cse2)))) (= (let ((.cse4 (select .cse3 (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~#main__max~0#1.offset|)))) (fp ((_ extract 31 31) .cse4) ((_ extract 30 23) .cse4) ((_ extract 22 0) .cse4))) ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse5) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv0 32)) (= |c_ULTIMATE.start_main_~#main__max~0#1.offset| (_ bv0 32)) (= (let ((.cse6 (select .cse3 |c_ULTIMATE.start_main_~#main__max~0#1.offset|))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))) ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32))) (= |c_ULTIMATE.start_main_~#main__min~0#1.offset| (_ bv0 32)) (= c_currentRoundingMode roundNearestTiesToEven) (fp.geq |c_ULTIMATE.start_main_~main__t~0#1| .cse5))) is different from false [2021-11-25 19:21:03,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:04,969 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-25 19:21:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:21:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 19:21:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:04,971 INFO L225 Difference]: With dead ends: 30 [2021-11-25 19:21:04,971 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:21:04,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=37, Invalid=57, Unknown=12, NotChecked=76, Total=182 [2021-11-25 19:21:04,974 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:04,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 1 Unknown, 113 Unchecked, 6.8s Time] [2021-11-25 19:21:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:21:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 19:21:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:21:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-25 19:21:04,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-25 19:21:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:04,981 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-25 19:21:04,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:21:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-25 19:21:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:21:04,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:04,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:05,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:21:05,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:21:05,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:21:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash -252887217, now seen corresponding path program 1 times [2021-11-25 19:21:05,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:21:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885377834] [2021-11-25 19:21:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:05,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:21:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:21:05,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:21:05,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48752df7-4018-480c-944f-9e3ebdea668f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:21:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:21:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:21:09,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:21:09,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 98 [2021-11-25 19:21:30,843 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_9 (_ BitVec 32))) (= (fp ((_ extract 31 31) v_arrayElimCell_9) ((_ extract 30 23) v_arrayElimCell_9) ((_ extract 22 0) v_arrayElimCell_9)) ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32)))) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((v_arrayElimCell_10 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_8 (_ BitVec 32)) (v_arrayElimCell_7 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_10) ((_ extract 30 23) v_arrayElimCell_10) ((_ extract 22 0) v_arrayElimCell_10))) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_8) ((_ extract 30 23) v_arrayElimCell_8) ((_ extract 22 0) v_arrayElimCell_8))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_7) ((_ extract 30 23) v_arrayElimCell_7) ((_ extract 22 0) v_arrayElimCell_7)))) (and (not (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse0)) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (= .cse2 .cse3) (= .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv12 32))) (= .cse0 .cse3) (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub c_currentRoundingMode .cse1 .cse2))))))) is different from false [2021-11-25 19:22:32,244 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_10 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_8 (_ BitVec 32)) (v_arrayElimCell_7 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_10) ((_ extract 30 23) v_arrayElimCell_10) ((_ extract 22 0) v_arrayElimCell_10))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_8) ((_ extract 30 23) v_arrayElimCell_8) ((_ extract 22 0) v_arrayElimCell_8))) (.cse3 (fp ((_ extract 31 31) v_arrayElimCell_7) ((_ extract 30 23) v_arrayElimCell_7) ((_ extract 22 0) v_arrayElimCell_7)))) (and (not (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse0)) (= .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv12 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (= .cse2 .cse0) (= .cse3 .cse2) (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse3) (fp.sub roundNearestTiesToEven .cse1 .cse3))) (_ +zero 11 53)))))) is different from false [2021-11-25 19:22:34,266 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_10 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_8 (_ BitVec 32)) (v_arrayElimCell_7 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_10) ((_ extract 30 23) v_arrayElimCell_10) ((_ extract 22 0) v_arrayElimCell_10))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_8) ((_ extract 30 23) v_arrayElimCell_8) ((_ extract 22 0) v_arrayElimCell_8))) (.cse3 (fp ((_ extract 31 31) v_arrayElimCell_7) ((_ extract 30 23) v_arrayElimCell_7) ((_ extract 22 0) v_arrayElimCell_7)))) (and (not (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse0)) (= .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv12 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (= .cse2 .cse0) (= .cse3 .cse2) (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse3) (fp.sub roundNearestTiesToEven .cse1 .cse3))) (_ +zero 11 53)))))) is different from true [2021-11-25 19:23:59,424 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 19:23:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:59,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:23:59,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:23:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885377834] [2021-11-25 19:23:59,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885377834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:59,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:59,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 19:23:59,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073762921] [2021-11-25 19:23:59,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:23:59,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:23:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:23:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=69, Unknown=3, NotChecked=38, Total=156 [2021-11-25 19:23:59,451 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:00,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []