./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/eq1.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_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/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_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/eq1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/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_8d55e845-2659-4a94-af1b-9a977f3241d8/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 869db528ad13c9c735b9d7d7c424c3acb9ac2ff587dc01a67569749e6bd1b68f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:51,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:51,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:51,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:51,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:51,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:52,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:52,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:52,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:52,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:52,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:52,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:52,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:52,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:52,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:52,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:52,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:52,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:52,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:52,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:52,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:52,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:52,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:52,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:52,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:52,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:52,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:52,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:52,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:52,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:52,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:52,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:52,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:52,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:52,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:52,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:52,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:52,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:52,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:52,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:52,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:52,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:52,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:52,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:52,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:52,092 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:52,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:52,093 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:52,093 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:52,094 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:52,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:52,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:52,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:52,095 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:52,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:52,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:52,095 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:52,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:52,096 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:52,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:52,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:52,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:52,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:52,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:52,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:52,098 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:52,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:52,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:52,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:52,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:52,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:52,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:52,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:52,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:52,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:52,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:52,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:52,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:52,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:52,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:52,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:52,101 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_8d55e845-2659-4a94-af1b-9a977f3241d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 869db528ad13c9c735b9d7d7c424c3acb9ac2ff587dc01a67569749e6bd1b68f [2021-11-07 01:03:52,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:52,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:52,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:52,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:52,413 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:52,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loop-invariants/eq1.c [2021-11-07 01:03:52,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/data/6f7fe61e6/e30440f2761747dd9b49199ff2ccd4a1/FLAG661bb0860 [2021-11-07 01:03:53,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:53,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/sv-benchmarks/c/loop-invariants/eq1.c [2021-11-07 01:03:53,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/data/6f7fe61e6/e30440f2761747dd9b49199ff2ccd4a1/FLAG661bb0860 [2021-11-07 01:03:53,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/data/6f7fe61e6/e30440f2761747dd9b49199ff2ccd4a1 [2021-11-07 01:03:53,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:53,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:53,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:53,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:53,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:53,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3317760d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53, skipping insertion in model container [2021-11-07 01:03:53,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:53,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:53,624 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_8d55e845-2659-4a94-af1b-9a977f3241d8/sv-benchmarks/c/loop-invariants/eq1.c[364,377] [2021-11-07 01:03:53,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:53,645 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:53,659 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_8d55e845-2659-4a94-af1b-9a977f3241d8/sv-benchmarks/c/loop-invariants/eq1.c[364,377] [2021-11-07 01:03:53,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:53,677 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:53,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53 WrapperNode [2021-11-07 01:03:53,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:53,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:53,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:53,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:53,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:53,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:53,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:53,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:53,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:53,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:53,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:53,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:53,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (1/1) ... [2021-11-07 01:03:53,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:53,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:53,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:53,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:03:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:54,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:54,290 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:03:54,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:54 BoogieIcfgContainer [2021-11-07 01:03:54,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:54,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:54,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:54,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:54,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:53" (1/3) ... [2021-11-07 01:03:54,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d80055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:54, skipping insertion in model container [2021-11-07 01:03:54,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:53" (2/3) ... [2021-11-07 01:03:54,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d80055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:54, skipping insertion in model container [2021-11-07 01:03:54,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:54" (3/3) ... [2021-11-07 01:03:54,303 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2021-11-07 01:03:54,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:54,310 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:03:54,365 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:54,373 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 01:03:54,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:03:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:03:54,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:54,394 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:03:54,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2037129, now seen corresponding path program 1 times [2021-11-07 01:03:54,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:54,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453111156] [2021-11-07 01:03:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:54,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:54,841 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 01:03:54,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:54,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453111156] [2021-11-07 01:03:54,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453111156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:54,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:54,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:54,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613744866] [2021-11-07 01:03:54,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:54,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:54,873 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 01:03:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:54,916 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-11-07 01:03:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-07 01:03:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:54,924 INFO L225 Difference]: With dead ends: 9 [2021-11-07 01:03:54,924 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:03:54,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:03:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:03:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 01:03:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:03:54,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2021-11-07 01:03:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:54,955 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:03:54,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 01:03:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:03:54,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:03:54,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:03:54,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:03:54,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:03:54,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:54,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:54,995 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 01:03:54,996 INFO L853 garLoopResultBuilder]: At program point L17-2(lines 16 22) the Hoare annotation is: (and (= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~w~0) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) [2021-11-07 01:03:54,996 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-07 01:03:54,996 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 01:03:54,997 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-11-07 01:03:54,997 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-11-07 01:03:54,998 INFO L853 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: (and (= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~w~0) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-11-07 01:03:55,002 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-07 01:03:55,004 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:03:55,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:03:55 BoogieIcfgContainer [2021-11-07 01:03:55,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:03:55,022 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:03:55,022 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:03:55,023 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:03:55,023 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:54" (3/4) ... [2021-11-07 01:03:55,028 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:03:55,040 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-07 01:03:55,040 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-07 01:03:55,041 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-07 01:03:55,041 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:03:55,041 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:03:55,090 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:03:55,091 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:03:55,093 INFO L168 Benchmark]: Toolchain (without parser) took 1683.18 ms. Allocated memory is still 138.4 MB. Free memory was 94.7 MB in the beginning and 68.9 MB in the end (delta: 25.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,093 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 110.6 MB in the beginning and 110.6 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:55,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.14 ms. Allocated memory is still 138.4 MB. Free memory was 94.5 MB in the beginning and 110.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.38 ms. Allocated memory is still 138.4 MB. Free memory was 110.0 MB in the beginning and 108.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,096 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 138.4 MB. Free memory was 108.8 MB in the beginning and 107.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:55,097 INFO L168 Benchmark]: RCFGBuilder took 501.64 ms. Allocated memory is still 138.4 MB. Free memory was 107.5 MB in the beginning and 95.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,098 INFO L168 Benchmark]: TraceAbstraction took 725.51 ms. Allocated memory is still 138.4 MB. Free memory was 94.9 MB in the beginning and 71.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,098 INFO L168 Benchmark]: Witness Printer took 68.69 ms. Allocated memory is still 138.4 MB. Free memory was 71.5 MB in the beginning and 68.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:55,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 110.6 MB in the beginning and 110.6 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.14 ms. Allocated memory is still 138.4 MB. Free memory was 94.5 MB in the beginning and 110.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.38 ms. Allocated memory is still 138.4 MB. Free memory was 110.0 MB in the beginning and 108.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 138.4 MB. Free memory was 108.8 MB in the beginning and 107.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 501.64 ms. Allocated memory is still 138.4 MB. Free memory was 107.5 MB in the beginning and 95.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 725.51 ms. Allocated memory is still 138.4 MB. Free memory was 94.9 MB in the beginning and 71.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 68.69 ms. Allocated memory is still 138.4 MB. Free memory was 71.5 MB in the beginning and 68.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 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: 2 SDtfs, 5 SDslu, 1 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 18 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x == w && z == y - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: (x == w && z == y) && !(0 == cond) RESULT: Ultimate proved your program to be correct! [2021-11-07 01:03:55,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d55e845-2659-4a94-af1b-9a977f3241d8/bin/utaipan-UUZaoUuFF8/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 Writing output log to file Ultimate.log Result: TRUE