./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF --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 032bdbaadc57a40b0ab079d12fe59c315df9e45b2b10a57560568a476c18d976 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:16:13,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:16:13,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:16:13,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:16:13,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:16:13,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:16:13,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:16:13,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:16:13,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:16:13,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:16:13,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:16:13,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:16:13,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:16:13,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:16:13,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:16:13,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:16:13,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:16:13,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:16:13,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:16:13,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:16:13,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:16:13,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:16:13,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:16:13,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:16:13,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:16:13,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:16:13,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:16:13,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:16:13,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:16:13,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:16:13,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:16:13,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:16:13,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:16:13,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:16:13,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:16:13,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:16:13,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:16:13,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:16:13,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:16:13,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:16:13,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:16:13,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:16:13,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:16:13,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:16:13,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:16:13,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:16:13,968 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:16:13,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:16:13,968 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:16:13,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:16:13,969 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:16:13,969 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:16:13,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:16:13,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:16:13,974 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:16:13,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:16:13,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:16:13,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:16:13,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:16:13,976 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:16:13,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:16:13,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:16:13,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:16:13,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:16:13,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:16:13,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:16:13,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:16:13,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:16:13,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:16:13,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:16:13,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:16:13,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:16:13,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:16:13,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:16:13,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:16:13,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:16:13,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:16:13,982 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:16:13,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:16:13,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:16:13,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:16:13,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:16:13,983 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_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 032bdbaadc57a40b0ab079d12fe59c315df9e45b2b10a57560568a476c18d976 [2021-11-12 23:16:14,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:16:14,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:16:14,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:16:14,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:16:14,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:16:14,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:14,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/588042b1a/e3e5259c82b44412a3cb82d9ef958618/FLAG3dd4323bb [2021-11-12 23:16:14,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:16:14,810 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:14,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/588042b1a/e3e5259c82b44412a3cb82d9ef958618/FLAG3dd4323bb [2021-11-12 23:16:15,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/588042b1a/e3e5259c82b44412a3cb82d9ef958618 [2021-11-12 23:16:15,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:16:15,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:16:15,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:16:15,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:16:15,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:16:15,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27aca224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15, skipping insertion in model container [2021-11-12 23:16:15,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:16:15,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:16:15,424 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[1995,2008] [2021-11-12 23:16:15,429 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[2364,2377] [2021-11-12 23:16:15,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:16:15,478 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:16:15,495 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[1995,2008] [2021-11-12 23:16:15,496 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[2364,2377] [2021-11-12 23:16:15,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:16:15,541 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:16:15,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15 WrapperNode [2021-11-12 23:16:15,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:16:15,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:16:15,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:16:15,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:16:15,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:16:15,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:16:15,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:16:15,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:16:15,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:16:15,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:16:15,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:16:15,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:16:15,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (1/1) ... [2021-11-12 23:16:15,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:16:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:16:15,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:16:15,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:16:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:16:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:16:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:16:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:16:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:16:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:16:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:16:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:16:16,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:16:16,160 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:16:16,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:16 BoogieIcfgContainer [2021-11-12 23:16:16,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:16:16,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:16:16,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:16:16,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:16:16,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:16:15" (1/3) ... [2021-11-12 23:16:16,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1d0146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:16, skipping insertion in model container [2021-11-12 23:16:16,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:15" (2/3) ... [2021-11-12 23:16:16,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1d0146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:16, skipping insertion in model container [2021-11-12 23:16:16,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:16" (3/3) ... [2021-11-12 23:16:16,183 INFO L111 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:16,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:16:16,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:16:16,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:16:16,269 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 [2021-11-12 23:16:16,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:16:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 38 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:16:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:16:16,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:16,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:16:16,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 7146571, now seen corresponding path program 1 times [2021-11-12 23:16:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:16:16,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569710133] [2021-11-12 23:16:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:16,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:16:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:16:16,426 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:16:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:16:16,470 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:16:16,473 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:16:16,474 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 23:16:16,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 23:16:16,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:16:16,482 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:16:16,486 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:16:16,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:16:16 BoogieIcfgContainer [2021-11-12 23:16:16,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:16:16,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:16:16,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:16:16,511 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:16:16,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:16" (3/4) ... [2021-11-12 23:16:16,515 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:16:16,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:16:16,517 INFO L158 Benchmark]: Toolchain (without parser) took 1362.42ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.5MB in the beginning and 69.7MB in the end (delta: -20.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:16:16,518 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory was 65.9MB in the beginning and 65.9MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:16:16,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.87ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.3MB in the beginning and 77.7MB in the end (delta: -28.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2021-11-12 23:16:16,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.18ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 75.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:16:16,520 INFO L158 Benchmark]: Boogie Preprocessor took 35.70ms. Allocated memory is still 104.9MB. Free memory was 75.7MB in the beginning and 74.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:16:16,521 INFO L158 Benchmark]: RCFGBuilder took 536.20ms. Allocated memory is still 104.9MB. Free memory was 74.2MB in the beginning and 57.2MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:16:16,522 INFO L158 Benchmark]: TraceAbstraction took 344.64ms. Allocated memory is still 104.9MB. Free memory was 56.8MB in the beginning and 70.0MB in the end (delta: -13.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:16:16,522 INFO L158 Benchmark]: Witness Printer took 4.96ms. Allocated memory is still 104.9MB. Free memory was 70.0MB in the beginning and 69.7MB in the end (delta: 277.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:16:16,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory was 65.9MB in the beginning and 65.9MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.87ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.3MB in the beginning and 77.7MB in the end (delta: -28.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.18ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 75.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.70ms. Allocated memory is still 104.9MB. Free memory was 75.7MB in the beginning and 74.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 536.20ms. Allocated memory is still 104.9MB. Free memory was 74.2MB in the beginning and 57.2MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 344.64ms. Allocated memory is still 104.9MB. Free memory was 56.8MB in the beginning and 70.0MB in the end (delta: -13.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.96ms. Allocated memory is still 104.9MB. Free memory was 70.0MB in the beginning and 69.7MB in the end (delta: 277.6kB). 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: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L322] COND TRUE __VERIFIER_nondet_int() [L323] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.4f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 2 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=45occurred 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 [2021-11-12 23:16:16,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/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_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF --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 032bdbaadc57a40b0ab079d12fe59c315df9e45b2b10a57560568a476c18d976 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:16:19,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:16:19,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:16:19,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:16:19,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:16:19,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:16:19,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:16:19,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:16:19,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:16:19,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:16:19,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:16:19,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:16:19,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:16:19,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:16:19,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:16:19,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:16:19,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:16:19,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:16:19,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:16:19,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:16:19,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:16:19,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:16:19,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:16:19,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:16:19,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:16:19,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:16:19,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:16:19,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:16:19,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:16:19,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:16:19,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:16:19,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:16:19,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:16:19,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:16:19,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:16:19,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:16:19,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:16:19,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:16:19,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:16:19,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:16:19,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:16:19,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:16:19,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:16:19,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:16:19,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:16:19,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:16:19,251 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:16:19,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:16:19,252 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:16:19,252 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:16:19,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:16:19,253 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:16:19,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:16:19,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:16:19,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:16:19,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:16:19,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:16:19,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:16:19,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:16:19,257 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:16:19,258 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:16:19,258 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:16:19,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:16:19,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:16:19,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:16:19,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:16:19,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:16:19,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:16:19,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:16:19,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:16:19,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:16:19,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:16:19,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:16:19,260 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:16:19,261 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:19,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:16:19,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:16:19,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:16:19,262 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_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 032bdbaadc57a40b0ab079d12fe59c315df9e45b2b10a57560568a476c18d976 [2021-11-12 23:16:19,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:16:19,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:16:19,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:16:19,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:16:19,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:16:19,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:19,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/8745ca560/ca6c44a5035b4e2dbb37d8bb60b815e2/FLAG1ef544770 [2021-11-12 23:16:20,391 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:16:20,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:20,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/8745ca560/ca6c44a5035b4e2dbb37d8bb60b815e2/FLAG1ef544770 [2021-11-12 23:16:20,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/data/8745ca560/ca6c44a5035b4e2dbb37d8bb60b815e2 [2021-11-12 23:16:20,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:16:20,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:16:20,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:16:20,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:16:20,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:16:20,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:16:20" (1/1) ... [2021-11-12 23:16:20,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e199c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:20, skipping insertion in model container [2021-11-12 23:16:20,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:16:20" (1/1) ... [2021-11-12 23:16:20,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:16:20,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:16:20,916 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[1995,2008] [2021-11-12 23:16:20,921 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[2364,2377] [2021-11-12 23:16:20,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:16:20,985 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:16:21,019 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[1995,2008] [2021-11-12 23:16:21,021 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/sv-benchmarks/c/combinations/square_7+soft_float_2a.c.cil.c[2364,2377] [2021-11-12 23:16:21,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:16:21,068 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:16:21,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21 WrapperNode [2021-11-12 23:16:21,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:16:21,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:16:21,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:16:21,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:16:21,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:16:21,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:16:21,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:16:21,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:16:21,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:16:21,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:16:21,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:16:21,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:16:21,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (1/1) ... [2021-11-12 23:16:21,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:16:21,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:16:21,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:16:21,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:16:21,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:16:21,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:16:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:16:21,280 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:16:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:16:21,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:16:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:16:21,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:16:23,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:16:23,843 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:16:23,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:23 BoogieIcfgContainer [2021-11-12 23:16:23,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:16:23,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:16:23,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:16:23,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:16:23,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:16:20" (1/3) ... [2021-11-12 23:16:23,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fb9630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:23, skipping insertion in model container [2021-11-12 23:16:23,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:16:21" (2/3) ... [2021-11-12 23:16:23,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fb9630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:23, skipping insertion in model container [2021-11-12 23:16:23,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:23" (3/3) ... [2021-11-12 23:16:23,855 INFO L111 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_2a.c.cil.c [2021-11-12 23:16:23,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:16:23,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:16:23,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:16:23,920 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 [2021-11-12 23:16:23,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:16:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:16:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:16:23,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:23,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:23,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-12 23:16:23,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:23,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13973509] [2021-11-12 23:16:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:23,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:23,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:24,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:16:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:16:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:24,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:24,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:24,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13973509] [2021-11-12 23:16:24,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13973509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:24,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:24,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:16:24,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331161819] [2021-11-12 23:16:24,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:24,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:16:24,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:16:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:16:24,650 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:24,680 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-11-12 23:16:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:16:24,682 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:16:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:24,691 INFO L225 Difference]: With dead ends: 117 [2021-11-12 23:16:24,691 INFO L226 Difference]: Without dead ends: 52 [2021-11-12 23:16:24,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:16:24,699 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:24,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:16:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-12 23:16:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-12 23:16:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:16:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-11-12 23:16:24,745 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-11-12 23:16:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:24,745 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-11-12 23:16:24,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-11-12 23:16:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:16:24,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:24,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:24,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:24,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:24,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-12 23:16:24,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:24,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231066809] [2021-11-12 23:16:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:24,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:24,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:24,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8512d607-2be1-41e3-baba-c9729471eb27/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process