./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH --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 f1476526c0a7c864e0f43f0a8231ffd3d7c324e1f397c219fdbe228643d49425 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:46:31,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:46:31,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:46:31,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:46:31,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:46:31,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:46:31,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:46:31,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:46:31,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:46:31,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:46:31,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:46:31,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:46:31,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:46:31,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:46:31,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:46:31,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:46:31,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:46:31,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:46:31,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:46:31,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:46:31,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:46:31,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:46:31,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:46:31,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:46:31,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:46:31,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:46:31,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:46:31,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:46:31,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:46:31,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:46:31,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:46:31,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:46:31,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:46:31,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:46:31,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:46:31,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:46:31,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:46:31,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:46:31,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:46:31,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:46:31,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:46:31,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:46:31,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:46:31,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:46:31,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:46:31,854 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:46:31,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:46:31,854 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:46:31,854 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:46:31,854 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:46:31,854 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:46:31,855 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:46:31,855 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:46:31,855 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:46:31,855 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:46:31,855 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:46:31,856 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:46:31,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:46:31,856 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:46:31,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:46:31,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:46:31,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:46:31,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:46:31,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:46:31,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:46:31,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:46:31,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:46:31,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:46:31,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:46:31,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:46:31,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:46:31,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:46:31,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:46:31,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:46:31,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:46:31,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:46:31,860 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:46:31,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:46:31,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:46:31,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:46:31,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:46:31,861 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_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1476526c0a7c864e0f43f0a8231ffd3d7c324e1f397c219fdbe228643d49425 [2021-11-03 03:46:32,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:46:32,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:46:32,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:46:32,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:46:32,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:46:32,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-11-03 03:46:32,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/data/3aa8db5f1/e2a75ac8ec4142c0bd8e482e4a19eb29/FLAG58042de0e [2021-11-03 03:46:32,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:46:32,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-11-03 03:46:32,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/data/3aa8db5f1/e2a75ac8ec4142c0bd8e482e4a19eb29/FLAG58042de0e [2021-11-03 03:46:33,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/data/3aa8db5f1/e2a75ac8ec4142c0bd8e482e4a19eb29 [2021-11-03 03:46:33,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:46:33,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:46:33,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:33,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:46:33,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:46:33,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bbbd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33, skipping insertion in model container [2021-11-03 03:46:33,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:46:33,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:46:33,232 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_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-11-03 03:46:33,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:33,274 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:46:33,286 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_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-11-03 03:46:33,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:33,302 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:46:33,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33 WrapperNode [2021-11-03 03:46:33,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:33,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:46:33,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:46:33,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:46:33,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:46:33,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:46:33,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:46:33,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:46:33,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:46:33,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:46:33,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:46:33,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:46:33,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (1/1) ... [2021-11-03 03:46:33,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:46:33,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:33,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:46:33,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:46:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 03:46:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:46:33,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:46:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 03:46:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:46:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:46:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:46:33,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:46:33,662 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 03:46:33,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:33 BoogieIcfgContainer [2021-11-03 03:46:33,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:46:33,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:46:33,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:46:33,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:46:33,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:46:33" (1/3) ... [2021-11-03 03:46:33,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed20d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:33, skipping insertion in model container [2021-11-03 03:46:33,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33" (2/3) ... [2021-11-03 03:46:33,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed20d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:33, skipping insertion in model container [2021-11-03 03:46:33,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:33" (3/3) ... [2021-11-03 03:46:33,675 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2021-11-03 03:46:33,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:46:33,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:46:33,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:46:33,739 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 [2021-11-03 03:46:33,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:46:33,753 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) [2021-11-03 03:46:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 03:46:33,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:33,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 03:46:33,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1912039, now seen corresponding path program 1 times [2021-11-03 03:46:33,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:33,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24780295] [2021-11-03 03:46:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:33,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:34,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:34,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24780295] [2021-11-03 03:46:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24780295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:34,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 03:46:34,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904743241] [2021-11-03 03:46:34,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:46:34,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:46:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:34,072 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-03 03:46:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:34,104 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 03:46:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 [2021-11-03 03:46:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:34,113 INFO L225 Difference]: With dead ends: 13 [2021-11-03 03:46:34,114 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 03:46:34,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 03:46:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 03:46:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-03 03:46:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 03:46:34,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 03:46:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:34,179 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 03:46:34,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-03 03:46:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 03:46:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:46:34,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:34,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:46:34,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:46:34,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:34,182 INFO L85 PathProgramCache]: Analyzing trace with hash 59140550, now seen corresponding path program 1 times [2021-11-03 03:46:34,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:34,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21846311] [2021-11-03 03:46:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:34,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:34,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21846311] [2021-11-03 03:46:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21846311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:46:34,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459538525] [2021-11-03 03:46:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:34,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:34,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:46:34,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:46:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:34,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:34,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459538525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:34,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793387634] [2021-11-03 03:46:34,500 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:46:34,500 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:46:34,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:46:34,518 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:46:34,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:46:34,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,569 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:34,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 03:46:34,577 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:34,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-03 03:46:34,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-11-03 03:46:34,622 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 36=[|v_#valid_20|]} [2021-11-03 03:46:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-03 03:46:34,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:34,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:34,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:34,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:34,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,816 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 03:46:34,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-03 03:46:34,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-03 03:46:34,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-03 03:46:34,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:34,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:34,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 03:46:34,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:46:34,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:152, output treesize:118 [2021-11-03 03:46:34,897 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-03 03:46:34,909 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:34,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-03 03:46:34,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-11-03 03:46:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-03 03:46:34,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 03:46:34,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 03:46:34,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:34,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:34,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:34,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-03 03:46:34,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:46:34,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:138, output treesize:134 [2021-11-03 03:46:34,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,200 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:35,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,211 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:35,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:46:35,218 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:35,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-03 03:46:35,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 295 [2021-11-03 03:46:35,228 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:35,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-11-03 03:46:35,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 333 [2021-11-03 03:46:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:35,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 54 [2021-11-03 03:46:35,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 03:46:35,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 03:46:35,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:35,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:35,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-03 03:46:35,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 03:46:35,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 03:46:35,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:35,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,404 INFO L180 QuantifierPusher]: treesize reduction 94, result has 76.3 percent of original size [2021-11-03 03:46:35,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-03 03:46:35,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-03 03:46:35,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:405, output treesize:303 [2021-11-03 03:46:35,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,497 INFO L180 QuantifierPusher]: treesize reduction 36, result has 62.9 percent of original size [2021-11-03 03:46:35,502 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:35,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-03 03:46:35,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-03 03:46:35,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 03:46:35,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-03 03:46:35,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-03 03:46:35,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:35,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:35,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-03 03:46:35,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:46:35,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-11-03 03:46:35,529 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:46:35,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:46:35,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:46:35,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 03:46:35,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095773699] [2021-11-03 03:46:35,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:46:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:46:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:35,845 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:35,867 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 03:46:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:46:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 03:46:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:35,871 INFO L225 Difference]: With dead ends: 12 [2021-11-03 03:46:35,871 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 03:46:35,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 03:46:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 03:46:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-03 03:46:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 03:46:35,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 03:46:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:35,875 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 03:46:35,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 03:46:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:46:35,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:35,876 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 03:46:35,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-03 03:46:36,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:36,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash 787803303, now seen corresponding path program 2 times [2021-11-03 03:46:36,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:36,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035095870] [2021-11-03 03:46:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:36,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:36,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035095870] [2021-11-03 03:46:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035095870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:46:36,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259561341] [2021-11-03 03:46:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:46:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:36,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:46:36,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 03:46:36,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-03 03:46:36,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:46:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:46:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:36,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-03 03:46:36,422 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-03 03:46:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 32 [2021-11-03 03:46:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 03:46:36,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 03:46:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259561341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:36,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 03:46:36,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2021-11-03 03:46:36,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246216034] [2021-11-03 03:46:36,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:46:36,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:46:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:36,555 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:38,602 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-11-03 03:46:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:46:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:38,602 INFO L225 Difference]: With dead ends: 9 [2021-11-03 03:46:38,603 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 03:46:38,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-03 03:46:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 03:46:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 03:46:38,604 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) [2021-11-03 03:46:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 03:46:38,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-11-03 03:46:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:38,604 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 03:46:38,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 03:46:38,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 03:46:38,607 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:46:38,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:38,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 03:46:38,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 03:46:38,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:38,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:38,829 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-03 03:46:38,829 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-03 03:46:38,829 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-03 03:46:38,829 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-11-03 03:46:38,829 INFO L853 garLoopResultBuilder]: At program point L16-3(lines 16 18) the Hoare annotation is: (or (exists ((v_ULTIMATE.start_main_~i~0_22 Int)) (and (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0.base|) (+ (* v_ULTIMATE.start_main_~i~0_22 4) |ULTIMATE.start_main_~#A~0.offset|)) v_ULTIMATE.start_main_~i~0_22) (<= ULTIMATE.start_main_~i~0 (+ v_ULTIMATE.start_main_~i~0_22 1)) (< v_ULTIMATE.start_main_~i~0_22 1024))) (= ULTIMATE.start_main_~i~0 0)) [2021-11-03 03:46:38,829 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-11-03 03:46:38,830 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-11-03 03:46:38,832 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-03 03:46:38,833 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 03:46:38,839 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,840 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,840 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,840 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,844 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,844 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,844 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,845 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:46:38 BoogieIcfgContainer [2021-11-03 03:46:38,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 03:46:38,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 03:46:38,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 03:46:38,847 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 03:46:38,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:33" (3/4) ... [2021-11-03 03:46:38,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-03 03:46:38,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-03 03:46:38,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-03 03:46:38,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-03 03:46:38,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 03:46:38,876 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists v_ULTIMATE.start_main_~i~0_22 : int :: (unknown-#memory_int-unknown[A][v_ULTIMATE.start_main_~i~0_22 * 4 + A] == v_ULTIMATE.start_main_~i~0_22 && i <= v_ULTIMATE.start_main_~i~0_22 + 1) && v_ULTIMATE.start_main_~i~0_22 < 1024) || i == 0 [2021-11-03 03:46:38,881 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 03:46:38,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 03:46:38,882 INFO L168 Benchmark]: Toolchain (without parser) took 5805.99 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 58.6 MB in the beginning and 88.9 MB in the end (delta: -30.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:46:38,883 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 75.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:46:38,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.09 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 69.7 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:38,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.80 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 68.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:46:38,884 INFO L168 Benchmark]: Boogie Preprocessor took 21.11 ms. Allocated memory is still 94.4 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:38,884 INFO L168 Benchmark]: RCFGBuilder took 308.18 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 56.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:38,885 INFO L168 Benchmark]: TraceAbstraction took 5179.85 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 56.3 MB in the beginning and 91.0 MB in the end (delta: -34.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:46:38,885 INFO L168 Benchmark]: Witness Printer took 35.14 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:38,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 75.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 225.09 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 69.7 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.80 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 68.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.11 ms. Allocated memory is still 94.4 MB. Free memory was 68.5 MB in the beginning and 67.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 308.18 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 56.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5179.85 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 56.3 MB in the beginning and 91.0 MB in the end (delta: -34.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 35.14 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] * 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: 5.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 1 SDslu, 12 SDs, 0 SdLazy, 15 SolverSat, 3 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 26 HoareAnnotationTreeSize, 2 FomulaSimplifications, 75 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 30 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 1 QuantifiedInterpolants, 96 SizeOfPredicates, 10 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 20/33 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: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant [2021-11-03 03:46:38,902 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,902 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,902 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,902 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,903 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,903 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,903 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] [2021-11-03 03:46:38,904 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_22,QUANTIFIED] Derived loop invariant: (\exists v_ULTIMATE.start_main_~i~0_22 : int :: (unknown-#memory_int-unknown[A][v_ULTIMATE.start_main_~i~0_22 * 4 + A] == v_ULTIMATE.start_main_~i~0_22 && i <= v_ULTIMATE.start_main_~i~0_22 + 1) && v_ULTIMATE.start_main_~i~0_22 < 1024) || i == 0 RESULT: Ultimate proved your program to be correct! [2021-11-03 03:46:38,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f612c5a-3b24-4e6d-b4ab-ec04994cb424/bin/utaipan-aC7eJsxGYH/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