./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/xcsp/Dubois-021.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/xcsp/Dubois-021.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8 --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 e914ef70bca7623c78f76c7515a1a020f1916ebb0197185152701ddd5f622073 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:07,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:07,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:07,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:07,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:07,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:07,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:07,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:07,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:07,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:07,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:07,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:07,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:07,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:07,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:07,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:07,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:07,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:07,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:07,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:07,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:07,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:07,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:07,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:07,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:07,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:07,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:07,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:07,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:07,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:07,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:07,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:07,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:07,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:07,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:07,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:07,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:07,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:07,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:07,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:07,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:07,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:20:07,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:07,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:07,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:07,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:07,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:07,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:07,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:20:07,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:07,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:07,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:20:07,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:20:07,851 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:07,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:20:07,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:20:07,852 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:20:07,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:07,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:07,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:20:07,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:07,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:07,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:07,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:07,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:07,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:07,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:07,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:07,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:07,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:07,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:07,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:07,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:07,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:07,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:07,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:07,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:20:07,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:20:07,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:07,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:07,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:07,860 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e914ef70bca7623c78f76c7515a1a020f1916ebb0197185152701ddd5f622073 [2021-11-07 01:20:08,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:08,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:08,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:08,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:08,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:08,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/xcsp/Dubois-021.c [2021-11-07 01:20:08,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/3a56f2122/a89c25e2b01d4a62b95dbe831a283571/FLAGc166d4215 [2021-11-07 01:20:08,892 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:08,892 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c [2021-11-07 01:20:08,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/3a56f2122/a89c25e2b01d4a62b95dbe831a283571/FLAGc166d4215 [2021-11-07 01:20:09,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/3a56f2122/a89c25e2b01d4a62b95dbe831a283571 [2021-11-07 01:20:09,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:09,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:09,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:09,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:09,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:09,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a89a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09, skipping insertion in model container [2021-11-07 01:20:09,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:09,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:09,582 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c[15084,15097] [2021-11-07 01:20:09,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:09,601 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:09,736 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c[15084,15097] [2021-11-07 01:20:09,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:09,753 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:09,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09 WrapperNode [2021-11-07 01:20:09,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:09,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:09,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:09,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:09,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:09,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:09,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:09,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:09,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:09,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:10,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:10,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:10,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:10,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:10,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (1/1) ... [2021-11-07 01:20:10,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:10,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:10,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:10,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:20:10,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:20:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:13,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:20:13,773 INFO L299 CfgBuilder]: Removed 340 assume(true) statements. [2021-11-07 01:20:13,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:13 BoogieIcfgContainer [2021-11-07 01:20:13,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:20:13,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:20:13,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:20:13,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:20:13,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:09" (1/3) ... [2021-11-07 01:20:13,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7feaf29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:13, skipping insertion in model container [2021-11-07 01:20:13,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:09" (2/3) ... [2021-11-07 01:20:13,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7feaf29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:13, skipping insertion in model container [2021-11-07 01:20:13,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:13" (3/3) ... [2021-11-07 01:20:13,786 INFO L111 eAbstractionObserver]: Analyzing ICFG Dubois-021.c [2021-11-07 01:20:13,792 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:20:13,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:20:13,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:20:13,860 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 [2021-11-07 01:20:13,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:20:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 4 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-11-07 01:20:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-07 01:20:13,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:13,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1] [2021-11-07 01:20:13,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 54467, now seen corresponding path program 1 times [2021-11-07 01:20:13,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:13,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881158392] [2021-11-07 01:20:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:13,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:20:14,299 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:20:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:20:14,517 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:20:14,519 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:20:14,520 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:20:14,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:20:14,526 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-07 01:20:14,529 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:20:14,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:20:14 BoogieIcfgContainer [2021-11-07 01:20:14,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:20:14,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:20:14,585 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:20:14,586 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:20:14,586 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:13" (3/4) ... [2021-11-07 01:20:14,589 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:20:14,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:20:14,592 INFO L168 Benchmark]: Toolchain (without parser) took 5366.90 ms. Allocated memory was 96.5 MB in the beginning and 201.3 MB in the end (delta: 104.9 MB). Free memory was 63.4 MB in the beginning and 129.1 MB in the end (delta: -65.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:14,592 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:14,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.55 ms. Allocated memory is still 96.5 MB. Free memory was 63.2 MB in the beginning and 56.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:14,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 160.13 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 56.1 MB in the beginning and 91.7 MB in the end (delta: -35.6 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:14,595 INFO L168 Benchmark]: Boogie Preprocessor took 86.05 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 86.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:14,595 INFO L168 Benchmark]: RCFGBuilder took 3774.02 ms. Allocated memory was 117.4 MB in the beginning and 155.2 MB in the end (delta: 37.7 MB). Free memory was 86.5 MB in the beginning and 46.5 MB in the end (delta: 40.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:14,596 INFO L168 Benchmark]: TraceAbstraction took 807.37 ms. Allocated memory was 155.2 MB in the beginning and 201.3 MB in the end (delta: 46.1 MB). Free memory was 45.5 MB in the beginning and 129.1 MB in the end (delta: -83.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:14,597 INFO L168 Benchmark]: Witness Printer took 4.39 ms. Allocated memory is still 201.3 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:14,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 528.55 ms. Allocated memory is still 96.5 MB. Free memory was 63.2 MB in the beginning and 56.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 160.13 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 56.1 MB in the beginning and 91.7 MB in the end (delta: -35.6 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 86.05 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 86.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3774.02 ms. Allocated memory was 117.4 MB in the beginning and 155.2 MB in the end (delta: 37.7 MB). Free memory was 86.5 MB in the beginning and 46.5 MB in the end (delta: 40.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 807.37 ms. Allocated memory was 155.2 MB in the beginning and 201.3 MB in the end (delta: 46.1 MB). Free memory was 45.5 MB in the beginning and 129.1 MB in the end (delta: -83.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.39 ms. Allocated memory is still 201.3 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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: 446]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 278. Possible FailurePath: [L22] int cond0; [L23] int dummy = 0; [L24] int N; [L25] int var0; [L26] var0 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L29] int var1; [L30] var1 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L33] int var2; [L34] var2 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L37] int var3; [L38] var3 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L41] int var4; [L42] var4 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L45] int var5; [L46] var5 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L49] int var6; [L50] var6 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L53] int var7; [L54] var7 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L57] int var8; [L58] var8 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L61] int var9; [L62] var9 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L65] int var10; [L66] var10 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L69] int var11; [L70] var11 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L73] int var12; [L74] var12 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L77] int var13; [L78] var13 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L81] int var14; [L82] var14 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L85] int var15; [L86] var15 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L89] int var16; [L90] var16 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L93] int var17; [L94] var17 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L97] int var18; [L98] var18 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L101] int var19; [L102] var19 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L105] int var20; [L106] var20 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L109] int var21; [L110] var21 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L113] int var22; [L114] var22 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L117] int var23; [L118] var23 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L121] int var24; [L122] var24 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L125] int var25; [L126] var25 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L129] int var26; [L130] var26 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L133] int var27; [L134] var27 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L137] int var28; [L138] var28 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L141] int var29; [L142] var29 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L145] int var30; [L146] var30 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L149] int var31; [L150] var31 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L153] int var32; [L154] var32 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L157] int var33; [L158] var33 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L161] int var34; [L162] var34 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L165] int var35; [L166] var35 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L169] int var36; [L170] var36 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L173] int var37; [L174] var37 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L177] int var38; [L178] var38 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L181] int var39; [L182] var39 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L185] int var40; [L186] var40 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L189] int var41; [L190] var41 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L193] int var42; [L194] var42 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L197] int var43; [L198] var43 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L201] int var44; [L202] var44 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L205] int var45; [L206] var45 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L209] int var46; [L210] var46 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L213] int var47; [L214] var47 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L217] int var48; [L218] var48 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L221] int var49; [L222] var49 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L225] int var50; [L226] var50 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L229] int var51; [L230] var51 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L233] int var52; [L234] var52 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L237] int var53; [L238] var53 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L241] int var54; [L242] var54 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L245] int var55; [L246] var55 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L249] int var56; [L250] var56 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L253] int var57; [L254] var57 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L257] int var58; [L258] var58 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L261] int var59; [L262] var59 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L265] int var60; [L266] var60 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L269] int var61; [L270] var61 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L273] int var62; [L274] var62 = __VERIFIER_nondet_int() [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L277] int myvar0 = 1; [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L18] COND FALSE !(!cond) [L446] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 4 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, 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: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4occurred 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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 2 NumberOfCodeBlocks, 2 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 [2021-11-07 01:20:14,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/xcsp/Dubois-021.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8 --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 e914ef70bca7623c78f76c7515a1a020f1916ebb0197185152701ddd5f622073 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:17,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:17,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:17,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:17,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:17,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:17,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:17,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:17,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:17,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:17,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:17,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:17,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:17,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:17,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:17,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:17,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:17,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:17,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:17,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:17,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:17,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:17,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:17,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:17,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:17,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:17,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:17,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:17,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:17,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:17,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:17,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:17,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:17,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:17,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:17,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:17,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:17,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:17,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:17,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:17,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:17,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:20:17,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:17,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:17,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:17,184 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:17,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:17,184 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:17,185 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:17,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:17,185 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:17,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:17,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:17,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:17,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:17,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:17,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:17,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:17,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:17,187 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:20:17,188 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:20:17,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:17,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:17,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:17,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:17,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:17,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:20:17,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:17,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:17,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:17,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:17,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:17,190 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:20:17,190 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:17,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:17,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:17,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:17,196 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e914ef70bca7623c78f76c7515a1a020f1916ebb0197185152701ddd5f622073 [2021-11-07 01:20:17,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:17,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:17,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:17,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:17,588 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:17,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/xcsp/Dubois-021.c [2021-11-07 01:20:17,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/5027b2cbf/f52c3dd0f83146349fed8f520a56fd64/FLAG30eec040e [2021-11-07 01:20:18,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:18,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c [2021-11-07 01:20:18,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/5027b2cbf/f52c3dd0f83146349fed8f520a56fd64/FLAG30eec040e [2021-11-07 01:20:18,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/data/5027b2cbf/f52c3dd0f83146349fed8f520a56fd64 [2021-11-07 01:20:18,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:18,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:18,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:18,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:18,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:18,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:18" (1/1) ... [2021-11-07 01:20:18,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b24dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:18, skipping insertion in model container [2021-11-07 01:20:18,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:18" (1/1) ... [2021-11-07 01:20:18,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:18,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:19,064 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c[15084,15097] [2021-11-07 01:20:19,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:19,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:19,203 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_80803d4e-c9b3-4e26-a033-3b0b3f319680/sv-benchmarks/c/xcsp/Dubois-021.c[15084,15097] [2021-11-07 01:20:19,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:19,220 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:19,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19 WrapperNode [2021-11-07 01:20:19,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:19,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:19,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:19,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:19,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:19,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:19,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:19,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:19,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:19,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:19,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:19,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:19,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (1/1) ... [2021-11-07 01:20:19,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:19,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:19,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:19,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:20:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:20:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:20,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:20:20,807 INFO L299 CfgBuilder]: Removed 340 assume(true) statements. [2021-11-07 01:20:20,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:20 BoogieIcfgContainer [2021-11-07 01:20:20,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:20:20,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:20:20,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:20:20,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:20:20,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:18" (1/3) ... [2021-11-07 01:20:20,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366b0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:20, skipping insertion in model container [2021-11-07 01:20:20,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:19" (2/3) ... [2021-11-07 01:20:20,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366b0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:20, skipping insertion in model container [2021-11-07 01:20:20,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:20" (3/3) ... [2021-11-07 01:20:20,825 INFO L111 eAbstractionObserver]: Analyzing ICFG Dubois-021.c [2021-11-07 01:20:20,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:20:20,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:20:20,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:20:20,911 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 [2021-11-07 01:20:20,911 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:20:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 342 states, 340 states have (on average 1.4970588235294118) internal successors, (509), 341 states have internal predecessors, (509), 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) [2021-11-07 01:20:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-07 01:20:20,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:20,981 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:20,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash -659545479, now seen corresponding path program 1 times [2021-11-07 01:20:21,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:21,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358520737] [2021-11-07 01:20:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:21,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:21,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:20:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:20:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:22,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:23,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:23,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358520737] [2021-11-07 01:20:23,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358520737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:23,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:20:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748915615] [2021-11-07 01:20:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:20:23,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:20:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:20:23,102 INFO L87 Difference]: Start difference. First operand has 342 states, 340 states have (on average 1.4970588235294118) internal successors, (509), 341 states have internal predecessors, (509), 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 2 states, 2 states have (on average 169.0) internal successors, (338), 2 states have internal predecessors, (338), 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) [2021-11-07 01:20:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:23,175 INFO L93 Difference]: Finished difference Result 678 states and 1012 transitions. [2021-11-07 01:20:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:20:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 169.0) internal successors, (338), 2 states have internal predecessors, (338), 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 338 [2021-11-07 01:20:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:23,190 INFO L225 Difference]: With dead ends: 678 [2021-11-07 01:20:23,191 INFO L226 Difference]: Without dead ends: 339 [2021-11-07 01:20:23,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:20:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-07 01:20:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-07 01:20:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0) internal successors, (338), 338 states have internal predecessors, (338), 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) [2021-11-07 01:20:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 338 transitions. [2021-11-07 01:20:23,252 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 338 transitions. Word has length 338 [2021-11-07 01:20:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:23,253 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 338 transitions. [2021-11-07 01:20:23,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.0) internal successors, (338), 2 states have internal predecessors, (338), 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) [2021-11-07 01:20:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 338 transitions. [2021-11-07 01:20:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-07 01:20:23,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:23,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:23,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:23,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:23,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 939443859, now seen corresponding path program 1 times [2021-11-07 01:20:23,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:23,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678801188] [2021-11-07 01:20:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:23,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:23,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:23,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80803d4e-c9b3-4e26-a033-3b0b3f319680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:21:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:02,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 342 conjunts are in the unsatisfiable core [2021-11-07 01:21:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates...