./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:10:53,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:10:53,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:10:53,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:10:53,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:10:53,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:10:53,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:10:53,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:10:53,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:10:53,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:10:53,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:10:53,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:10:53,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:10:53,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:10:53,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:10:53,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:10:53,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:10:53,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:10:53,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:10:53,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:10:53,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:10:53,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:10:53,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:10:53,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:10:53,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:10:53,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:10:53,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:10:53,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:10:53,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:10:53,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:10:53,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:10:53,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:10:53,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:10:53,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:10:53,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:10:53,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:10:53,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:10:53,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:10:53,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:10:53,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:10:53,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:10:53,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:10:53,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:10:53,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:10:53,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:10:53,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:10:53,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:10:53,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:10:53,249 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:10:53,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:10:53,249 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:10:53,249 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:10:53,250 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:10:53,250 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:10:53,251 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:10:53,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:10:53,251 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:10:53,251 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:10:53,252 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:10:53,252 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:10:53,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:10:53,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:10:53,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:10:53,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:10:53,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:10:53,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:10:53,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:10:53,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:10:53,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:10:53,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:10:53,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:10:53,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:10:53,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:10:53,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:10:53,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:53,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:10:53,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:10:53,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:10:53,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:10:53,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:10:53,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:10:53,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:10:53,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:10:53,260 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_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-23 03:10:53,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:10:53,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:10:53,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:10:53,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:10:53,611 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:10:53,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:10:53,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/d0697a63b/556d72ab98824a7ab00ceacc82edb457/FLAGeae161df1 [2021-11-23 03:10:54,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:10:54,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:10:54,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/d0697a63b/556d72ab98824a7ab00ceacc82edb457/FLAGeae161df1 [2021-11-23 03:10:54,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/d0697a63b/556d72ab98824a7ab00ceacc82edb457 [2021-11-23 03:10:54,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:10:54,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:10:54,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:10:54,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:10:54,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:10:54,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:54,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8986940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54, skipping insertion in model container [2021-11-23 03:10:54,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:54,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:10:54,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:10:54,869 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_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-23 03:10:54,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:10:54,892 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:10:54,922 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_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-23 03:10:54,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:10:54,942 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:10:54,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54 WrapperNode [2021-11-23 03:10:54,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:10:54,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:10:54,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:10:54,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:10:54,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:54,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:54,999 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2021-11-23 03:10:55,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:10:55,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:10:55,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:10:55,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:10:55,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:10:55,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:10:55,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:10:55,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:10:55,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (1/1) ... [2021-11-23 03:10:55,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:55,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:10:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:10:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:10:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:10:55,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:10:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:10:55,240 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:10:55,242 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:10:55,339 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:10:55,353 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:10:55,354 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:10:55,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:10:55 BoogieIcfgContainer [2021-11-23 03:10:55,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:10:55,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:10:55,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:10:55,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:10:55,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:10:54" (1/3) ... [2021-11-23 03:10:55,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70320f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:10:55, skipping insertion in model container [2021-11-23 03:10:55,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:54" (2/3) ... [2021-11-23 03:10:55,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70320f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:10:55, skipping insertion in model container [2021-11-23 03:10:55,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:10:55" (3/3) ... [2021-11-23 03:10:55,374 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:10:55,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:10:55,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:10:55,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:10:55,465 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 [2021-11-23 03:10:55,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:10:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:10:55,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:55,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:10:55,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1497591, now seen corresponding path program 1 times [2021-11-23 03:10:55,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:55,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785697007] [2021-11-23 03:10:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:55,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:10:55,617 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:10:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:10:55,655 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:10:55,658 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:10:55,660 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:10:55,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:10:55,670 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 03:10:55,675 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:10:55,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:10:55 BoogieIcfgContainer [2021-11-23 03:10:55,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:10:55,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:10:55,707 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:10:55,707 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:10:55,708 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:10:55" (3/4) ... [2021-11-23 03:10:55,712 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:10:55,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:10:55,714 INFO L158 Benchmark]: Toolchain (without parser) took 1127.97ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 53.3MB in the beginning and 69.7MB in the end (delta: -16.4MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,714 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:10:55,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.96ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 53.0MB in the beginning and 93.7MB in the end (delta: -40.7MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.10ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,717 INFO L158 Benchmark]: Boogie Preprocessor took 40.02ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.6MB in the end (delta: 807.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:10:55,718 INFO L158 Benchmark]: RCFGBuilder took 314.27ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 82.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,719 INFO L158 Benchmark]: TraceAbstraction took 346.38ms. Allocated memory is still 117.4MB. Free memory was 82.3MB in the beginning and 70.1MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,720 INFO L158 Benchmark]: Witness Printer took 5.62ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 69.7MB in the end (delta: 404.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:10:55,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 356.96ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 53.0MB in the beginning and 93.7MB in the end (delta: -40.7MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.10ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.02ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.6MB in the end (delta: 807.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 314.27ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 82.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 346.38ms. Allocated memory is still 117.4MB. Free memory was 82.3MB in the beginning and 70.1MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 5.62ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 69.7MB in the end (delta: 404.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 03:10:55,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:10:58,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:10:58,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:10:58,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:10:58,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:10:58,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:10:58,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:10:58,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:10:58,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:10:58,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:10:58,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:10:58,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:10:58,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:10:58,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:10:58,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:10:58,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:10:58,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:10:58,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:10:58,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:10:58,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:10:58,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:10:58,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:10:58,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:10:58,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:10:58,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:10:58,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:10:58,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:10:58,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:10:58,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:10:58,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:10:58,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:10:58,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:10:58,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:10:58,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:10:58,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:10:58,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:10:58,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:10:58,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:10:58,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:10:58,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:10:58,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:10:58,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:10:58,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:10:58,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:10:58,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:10:58,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:10:58,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:10:58,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:10:58,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:10:58,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:10:58,627 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:10:58,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:10:58,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:10:58,629 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:10:58,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:10:58,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:10:58,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:10:58,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:10:58,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:10:58,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:10:58,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:10:58,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:10:58,633 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:10:58,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:10:58,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:10:58,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:10:58,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:10:58,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:10:58,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:10:58,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:10:58,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:10:58,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:58,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:10:58,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:10:58,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:10:58,637 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:10:58,637 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:10:58,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:10:58,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:10:58,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:10:58,638 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_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-11-23 03:10:59,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:10:59,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:10:59,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:10:59,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:10:59,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:10:59,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:10:59,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/877391f89/1d8296f46c504719827c8bb8bf65f2bc/FLAG0837a09a9 [2021-11-23 03:10:59,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:10:59,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:10:59,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/877391f89/1d8296f46c504719827c8bb8bf65f2bc/FLAG0837a09a9 [2021-11-23 03:11:00,219 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/data/877391f89/1d8296f46c504719827c8bb8bf65f2bc [2021-11-23 03:11:00,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:11:00,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:11:00,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:00,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:11:00,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:11:00,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5598e456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00, skipping insertion in model container [2021-11-23 03:11:00,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:11:00,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:11:00,491 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_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-23 03:11:00,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:00,526 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:11:00,550 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_b3294919-bf5d-494a-aa63-437a5b276841/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-11-23 03:11:00,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:00,572 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:11:00,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00 WrapperNode [2021-11-23 03:11:00,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:00,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:00,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:11:00,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:11:00,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,615 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-11-23 03:11:00,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:00,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:11:00,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:11:00,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:11:00,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:11:00,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:11:00,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:11:00,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:11:00,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:00,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:00,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:11:00,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:11:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:11:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:11:00,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:11:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:11:00,829 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:11:00,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:11:04,738 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:11:04,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:11:04,745 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:11:04,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:04 BoogieIcfgContainer [2021-11-23 03:11:04,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:11:04,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:11:04,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:11:04,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:11:04,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:11:00" (1/3) ... [2021-11-23 03:11:04,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed30fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:04, skipping insertion in model container [2021-11-23 03:11:04,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (2/3) ... [2021-11-23 03:11:04,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed30fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:04, skipping insertion in model container [2021-11-23 03:11:04,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:04" (3/3) ... [2021-11-23 03:11:04,756 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-11-23 03:11:04,762 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:11:04,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:11:04,819 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:11:04,828 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 [2021-11-23 03:11:04,828 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:11:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:11:04,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:04,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:11:04,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-11-23 03:11:04,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:11:04,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780554239] [2021-11-23 03:11:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:04,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:11:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:11:04,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:11:04,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:11:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:11:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:12,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:22,129 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (fp.eq (fp.div c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) .cse0))) is different from true [2021-11-23 03:11:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:22,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:11:22,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780554239] [2021-11-23 03:11:22,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780554239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:22,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 03:11:22,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742273711] [2021-11-23 03:11:22,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:22,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:11:22,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:11:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:11:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2021-11-23 03:11:22,193 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:30,564 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-23 03:11:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:11:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:11:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:30,577 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:11:30,577 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 03:11:30,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=20, Invalid=24, Unknown=2, NotChecked=10, Total=56 [2021-11-23 03:11:30,586 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:30,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 9 Unchecked, 3.0s Time] [2021-11-23 03:11:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 03:11:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 03:11:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-23 03:11:30,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-11-23 03:11:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:30,624 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-23 03:11:30,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-23 03:11:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:11:30,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:30,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-23 03:11:30,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:30,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:11:30,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 1 times [2021-11-23 03:11:30,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:11:30,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90969965] [2021-11-23 03:11:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:30,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:11:30,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:11:30,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:11:30,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:11:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:11:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:47,048 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:12:00,756 WARN L227 SmtUtils]: Spent 7.75s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:12:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:13,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:18,503 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from false [2021-11-23 03:12:26,157 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-23 03:12:28,462 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-23 03:12:35,724 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-11-23 03:12:38,153 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-11-23 03:12:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:12:38,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:12:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90969965] [2021-11-23 03:12:38,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90969965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126972322] [2021-11-23 03:12:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:38,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:12:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:12:38,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:12:38,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 03:12:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:12:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:53,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:13:07,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126972322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663647649] [2021-11-23 03:13:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:07,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:07,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:07,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:07,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:13:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:13:35,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:43,291 WARN L227 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:13:51,802 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:14:19,135 WARN L227 SmtUtils]: Spent 10.80s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:14:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:19,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:34,416 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 03:14:36,559 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 03:14:41,729 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:14:49,023 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 03:14:51,333 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 03:14:57,025 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:15:03,048 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:15:05,513 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-23 03:15:07,978 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-23 03:15:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:15:07,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663647649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:07,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:15:07,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 15 [2021-11-23 03:15:07,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719430648] [2021-11-23 03:15:07,981 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:15:07,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:15:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:15:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=56, Unknown=20, NotChecked=126, Total=240 [2021-11-23 03:15:07,984 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-23 03:15:10,509 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse2) .cse2))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse2) .cse1)))) (and .cse0 (or .cse0 (fp.eq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2021-11-23 03:15:13,143 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse0))) (let ((.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse0) .cse2)))) (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) .cse1 (= c_currentRoundingMode roundNearestTiesToEven) (or (fp.eq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) .cse1))))) is different from true [2021-11-23 03:15:39,853 WARN L227 SmtUtils]: Spent 15.40s on a formula simplification. DAG size of input: 19 DAG size of output: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:15:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:44,031 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-23 03:15:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:15:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:15:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:44,033 INFO L225 Difference]: With dead ends: 13 [2021-11-23 03:15:44,033 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:15:44,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 119.1s TimeCoverageRelationStatistics Valid=52, Invalid=86, Unknown=26, NotChecked=216, Total=380 [2021-11-23 03:15:44,036 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:44,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 42 Unchecked, 3.3s Time] [2021-11-23 03:15:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:15:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:15:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-23 03:15:44,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-23 03:15:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:44,043 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-23 03:15:44,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-23 03:15:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-23 03:15:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:15:44,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:44,044 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-23 03:15:44,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:15:44,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:44,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:44,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:15:44,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 2 times [2021-11-23 03:15:44,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:15:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636985165] [2021-11-23 03:15:44,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:15:44,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:15:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:15:44,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:15:44,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:15:48,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:15:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:15:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:53,527 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 03:15:58,812 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:16:01,324 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 03:16:07,384 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:16:09,774 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 03:16:16,743 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:16:19,475 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 03:16:30,292 WARN L227 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:16:32,476 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse0)) (= |c_ULTIMATE.start_main_~main__x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 03:16:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 03:16:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:42,380 WARN L838 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from false [2021-11-23 03:16:44,542 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-11-23 03:16:49,929 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:16:57,208 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2021-11-23 03:16:59,508 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2021-11-23 03:17:05,212 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:17:11,267 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:17:13,760 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-11-23 03:17:16,220 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-11-23 03:17:22,558 WARN L227 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:17:24,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:17:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636985165] [2021-11-23 03:17:24,678 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 8449 column 7: push canceled [2021-11-23 03:17:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1796083543] [2021-11-23 03:17:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:17:24,679 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:17:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:17:24,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:17:24,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 03:17:31,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:17:31,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:31,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:17:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:31,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Function currentRoundingMode is already defined. [2021-11-23 03:17:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334433725] [2021-11-23 03:17:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:17:31,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:31,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:31,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:21:48,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:21:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:21:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:21:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:49,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Function currentRoundingMode is already defined. [2021-11-23 03:21:49,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:49,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 03:21:49,322 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-23 03:21:49,322 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 03:21:49,327 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:21:49,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 03:21:49,730 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2021-11-23 03:21:49,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:49,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:21:49,956 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-23 03:21:49,958 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:21:49,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:21:49 BoogieIcfgContainer [2021-11-23 03:21:49,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:21:49,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:21:49,974 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:21:49,974 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:21:49,975 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:04" (3/4) ... [2021-11-23 03:21:49,979 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:21:49,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:21:49,982 INFO L158 Benchmark]: Toolchain (without parser) took 649755.76ms. Allocated memory is still 62.9MB. Free memory was 42.9MB in the beginning and 28.2MB in the end (delta: 14.7MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2021-11-23 03:21:49,982 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 62.9MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:21:49,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.64ms. Allocated memory is still 62.9MB. Free memory was 42.8MB in the beginning and 32.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:21:49,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.06ms. Allocated memory is still 62.9MB. Free memory was 32.7MB in the beginning and 31.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:21:49,984 INFO L158 Benchmark]: Boogie Preprocessor took 41.39ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 30.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:21:49,984 INFO L158 Benchmark]: RCFGBuilder took 4088.38ms. Allocated memory is still 62.9MB. Free memory was 30.1MB in the beginning and 39.5MB in the end (delta: -9.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2021-11-23 03:21:49,985 INFO L158 Benchmark]: TraceAbstraction took 645224.36ms. Allocated memory is still 62.9MB. Free memory was 39.2MB in the beginning and 28.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-11-23 03:21:49,985 INFO L158 Benchmark]: Witness Printer took 5.82ms. Allocated memory is still 62.9MB. Free memory is still 28.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:21:49,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 62.9MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 345.64ms. Allocated memory is still 62.9MB. Free memory was 42.8MB in the beginning and 32.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.06ms. Allocated memory is still 62.9MB. Free memory was 32.7MB in the beginning and 31.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.39ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 30.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 4088.38ms. Allocated memory is still 62.9MB. Free memory was 30.1MB in the beginning and 39.5MB in the end (delta: -9.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * TraceAbstraction took 645224.36ms. Allocated memory is still 62.9MB. Free memory was 39.2MB in the beginning and 28.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * Witness Printer took 5.82ms. Allocated memory is still 62.9MB. Free memory is still 28.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1] int __return_main; [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND TRUE main__x1 != main__x [L14] main__x = main__x1 [L15] main__x1 = main__x / 1.6 [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 [L25] COND TRUE __VERIFIER_assert__cond == 0 [L27] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 645.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 44.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 51 IncrementalHoareTripleChecker+Unchecked, 17 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 9 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 133.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 40.3s SatisfiabilityAnalysisTime, 293.9s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 600 SizeOfPredicates, 27 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/28 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 [2021-11-23 03:21:50,219 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-23 03:21:50,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3294919-bf5d-494a-aa63-437a5b276841/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN