./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/rule60_list.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/rule60_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 057ace51c51df31e3d76df060fee6a035219068ccdea21d39f1ea3a0064d5b3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:02:03,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:02:03,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:02:03,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:02:03,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:02:03,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:02:03,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:02:03,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:02:03,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:02:03,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:02:03,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:02:03,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:02:03,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:02:03,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:02:03,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:02:03,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:02:03,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:02:03,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:02:03,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:02:03,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:02:03,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:02:03,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:02:03,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:02:03,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:02:03,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:02:03,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:02:03,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:02:03,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:02:03,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:02:03,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:02:03,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:02:03,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:02:03,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:02:03,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:02:03,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:02:03,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:02:03,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:02:03,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:02:03,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:02:03,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:02:03,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:02:03,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:02:03,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:02:03,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:02:03,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:02:03,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:02:03,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:02:03,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:02:03,670 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:02:03,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:02:03,671 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:02:03,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:02:03,671 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:02:03,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:02:03,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:02:03,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:02:03,672 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:02:03,673 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:02:03,673 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:02:03,673 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:02:03,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:02:03,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:02:03,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:02:03,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:02:03,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:02:03,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:02:03,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:02:03,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:02:03,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:02:03,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:02:03,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:02:03,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:02:03,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:02:03,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:02:03,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:02:03,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:02:03,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:02:03,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:02:03,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:02:03,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:02:03,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:02:03,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:02:03,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:02:03,685 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_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 057ace51c51df31e3d76df060fee6a035219068ccdea21d39f1ea3a0064d5b3d [2021-11-23 03:02:04,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:02:04,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:02:04,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:02:04,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:02:04,070 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:02:04,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-regression/rule60_list.i [2021-11-23 03:02:04,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/data/f4f674b4d/7075a0dc28494b31a19831f90b4c5c56/FLAG895a05222 [2021-11-23 03:02:04,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:02:04,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/sv-benchmarks/c/ldv-regression/rule60_list.i [2021-11-23 03:02:04,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/data/f4f674b4d/7075a0dc28494b31a19831f90b4c5c56/FLAG895a05222 [2021-11-23 03:02:05,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/data/f4f674b4d/7075a0dc28494b31a19831f90b4c5c56 [2021-11-23 03:02:05,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:02:05,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:02:05,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:02:05,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:02:05,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:02:05,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec91a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05, skipping insertion in model container [2021-11-23 03:02:05,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:02:05,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:02:05,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/sv-benchmarks/c/ldv-regression/rule60_list.i[291,304] [2021-11-23 03:02:05,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:02:05,663 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:02:05,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/sv-benchmarks/c/ldv-regression/rule60_list.i[291,304] [2021-11-23 03:02:05,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:02:05,770 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:02:05,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05 WrapperNode [2021-11-23 03:02:05,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:02:05,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:02:05,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:02:05,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:02:05,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,821 INFO L137 Inliner]: procedures = 124, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-23 03:02:05,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:02:05,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:02:05,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:02:05,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:02:05,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:02:05,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:02:05,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:02:05,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:02:05,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (1/1) ... [2021-11-23 03:02:05,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:02:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:02:05,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:02:05,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:02:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:02:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:02:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:02:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:02:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-23 03:02:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-23 03:02:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:02:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-11-23 03:02:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-11-23 03:02:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:02:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:02:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:02:06,067 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:02:06,069 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:02:06,209 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:02:06,233 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:02:06,233 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:02:06,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:06 BoogieIcfgContainer [2021-11-23 03:02:06,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:02:06,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:02:06,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:02:06,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:02:06,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:02:05" (1/3) ... [2021-11-23 03:02:06,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c02a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:06, skipping insertion in model container [2021-11-23 03:02:06,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:05" (2/3) ... [2021-11-23 03:02:06,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c02a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:06, skipping insertion in model container [2021-11-23 03:02:06,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:06" (3/3) ... [2021-11-23 03:02:06,267 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list.i [2021-11-23 03:02:06,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:02:06,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:02:06,354 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:02:06,361 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:02:06,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:02:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:02:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:02:06,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:06,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:02:06,386 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1460954449, now seen corresponding path program 1 times [2021-11-23 03:02:06,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:06,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177483088] [2021-11-23 03:02:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:06,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:02:06,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177483088] [2021-11-23 03:02:06,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177483088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:06,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:06,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:02:06,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720423594] [2021-11-23 03:02:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:02:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:02:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:02:07,064 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:07,235 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2021-11-23 03:02:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:02:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:02:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:07,247 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:02:07,247 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:02:07,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:02:07,255 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:02:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:02:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:02:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-23 03:02:07,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-11-23 03:02:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:07,298 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-23 03:02:07,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-23 03:02:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:02:07,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:07,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:02:07,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:02:07,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1720466664, now seen corresponding path program 1 times [2021-11-23 03:02:07,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:07,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96204427] [2021-11-23 03:02:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:07,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:02:07,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96204427] [2021-11-23 03:02:07,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96204427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:07,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:07,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:02:07,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231856906] [2021-11-23 03:02:07,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:07,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:02:07,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:02:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:02:07,514 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:07,644 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-11-23 03:02:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:02:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 03:02:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:07,647 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:02:07,647 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:02:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:02:07,649 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:07,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:02:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:02:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:02:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2021-11-23 03:02:07,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 11 [2021-11-23 03:02:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:07,657 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2021-11-23 03:02:07,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2021-11-23 03:02:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:02:07,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:07,659 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:02:07,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:02:07,659 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash 969392909, now seen corresponding path program 1 times [2021-11-23 03:02:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:07,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369004641] [2021-11-23 03:02:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:07,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:02:07,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:07,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369004641] [2021-11-23 03:02:07,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369004641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:07,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:07,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:02:07,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644878967] [2021-11-23 03:02:07,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:02:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:02:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:02:07,928 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:07,987 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-11-23 03:02:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:02:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-23 03:02:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:07,989 INFO L225 Difference]: With dead ends: 16 [2021-11-23 03:02:07,989 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:02:07,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:02:07,991 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:07,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:02:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:02:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:02:07,994 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) [2021-11-23 03:02:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:02:07,994 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-11-23 03:02:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:07,994 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:02:07,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:02:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:02:07,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:02:07,997 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:02:07,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:02:08,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:02:08,096 INFO L854 garLoopResultBuilder]: At program point list_addENTRY(lines 522 525) the Hoare annotation is: (or (not (= |list_add_#in~new.offset| 0)) (not (= (select (select |old(#memory_int)| |list_add_#in~new.base|) 8) 0)) (= (select (select |#memory_int| |list_add_#in~new.base|) 8) 0)) [2021-11-23 03:02:08,097 INFO L858 garLoopResultBuilder]: For program point L523(line 523) no Hoare annotation was computed. [2021-11-23 03:02:08,097 INFO L854 garLoopResultBuilder]: At program point L523-2(line 523) the Hoare annotation is: (or (not (= |list_add_#in~new.offset| 0)) (not (= (select (select |old(#memory_int)| |list_add_#in~new.base|) 8) 0))) [2021-11-23 03:02:08,097 INFO L858 garLoopResultBuilder]: For program point L523-3(line 523) no Hoare annotation was computed. [2021-11-23 03:02:08,097 INFO L858 garLoopResultBuilder]: For program point list_addEXIT(lines 522 525) no Hoare annotation was computed. [2021-11-23 03:02:08,098 INFO L858 garLoopResultBuilder]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2021-11-23 03:02:08,098 INFO L858 garLoopResultBuilder]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2021-11-23 03:02:08,098 INFO L861 garLoopResultBuilder]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2021-11-23 03:02:08,098 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:02:08,099 INFO L858 garLoopResultBuilder]: For program point L527(line 527) no Hoare annotation was computed. [2021-11-23 03:02:08,099 INFO L854 garLoopResultBuilder]: At program point L527-2(line 527) the Hoare annotation is: false [2021-11-23 03:02:08,099 INFO L858 garLoopResultBuilder]: For program point L527-3(line 527) no Hoare annotation was computed. [2021-11-23 03:02:08,099 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:02:08,100 INFO L854 garLoopResultBuilder]: At program point L538(line 538) the Hoare annotation is: (and (<= |~#head~0.offset| |ULTIMATE.start_list_del_~entry#1.offset|) (= |ULTIMATE.start_main_~dev~0#1.base| |ULTIMATE.start_list_del_~entry#1.base|) (<= |ULTIMATE.start_list_del_~entry#1.offset| (+ |~#head~0.offset| |ULTIMATE.start_main_~dev~0#1.offset|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~dev~0#1.base|) (+ |~#head~0.offset| 8)) 0) (<= |~#head~0.offset| 0) (= |~#head~0.offset| |ULTIMATE.start_main_~dev~0#1.offset|)) [2021-11-23 03:02:08,100 INFO L854 garLoopResultBuilder]: At program point L536(line 536) the Hoare annotation is: (and (= |ULTIMATE.start_main_~dev~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~dev~0#1.base|) (+ |ULTIMATE.start_main_~dev~0#1.offset| 8)) 0) (= |~#head~0.offset| |ULTIMATE.start_main_~dev~0#1.offset|)) [2021-11-23 03:02:08,100 INFO L858 garLoopResultBuilder]: For program point L536-1(line 536) no Hoare annotation was computed. [2021-11-23 03:02:08,100 INFO L858 garLoopResultBuilder]: For program point L534(lines 534 539) no Hoare annotation was computed. [2021-11-23 03:02:08,101 INFO L854 garLoopResultBuilder]: At program point L534-1(lines 534 539) the Hoare annotation is: (and (= |ULTIMATE.start_main_~dev~0#1.offset| 0) (= |~#head~0.offset| |ULTIMATE.start_main_~dev~0#1.offset|)) [2021-11-23 03:02:08,104 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-23 03:02:08,106 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:02:08,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:02:08 BoogieIcfgContainer [2021-11-23 03:02:08,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:02:08,123 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:02:08,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:02:08,124 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:02:08,124 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:06" (3/4) ... [2021-11-23 03:02:08,128 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:02:08,134 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure list_add [2021-11-23 03:02:08,134 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __blast_assert [2021-11-23 03:02:08,139 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-23 03:02:08,140 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-23 03:02:08,140 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 03:02:08,140 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:02:08,178 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:02:08,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:02:08,179 INFO L158 Benchmark]: Toolchain (without parser) took 3018.62ms. Allocated memory is still 123.7MB. Free memory was 84.7MB in the beginning and 53.0MB in the end (delta: 31.7MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,179 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory was 102.4MB in the beginning and 102.4MB in the end (delta: 55.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:02:08,180 INFO L158 Benchmark]: CACSL2BoogieTranslator took 606.61ms. Allocated memory is still 123.7MB. Free memory was 84.5MB in the beginning and 91.1MB in the end (delta: -6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.76ms. Allocated memory is still 123.7MB. Free memory was 91.1MB in the beginning and 89.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,181 INFO L158 Benchmark]: Boogie Preprocessor took 37.00ms. Allocated memory is still 123.7MB. Free memory was 89.3MB in the beginning and 88.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:02:08,181 INFO L158 Benchmark]: RCFGBuilder took 376.37ms. Allocated memory is still 123.7MB. Free memory was 87.9MB in the beginning and 77.1MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,182 INFO L158 Benchmark]: TraceAbstraction took 1883.30ms. Allocated memory is still 123.7MB. Free memory was 76.4MB in the beginning and 56.0MB in the end (delta: 20.4MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,183 INFO L158 Benchmark]: Witness Printer took 54.76ms. Allocated memory is still 123.7MB. Free memory was 56.0MB in the beginning and 53.0MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:02:08,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory was 102.4MB in the beginning and 102.4MB in the end (delta: 55.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 606.61ms. Allocated memory is still 123.7MB. Free memory was 84.5MB in the beginning and 91.1MB in the end (delta: -6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.76ms. Allocated memory is still 123.7MB. Free memory was 91.1MB in the beginning and 89.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.00ms. Allocated memory is still 123.7MB. Free memory was 89.3MB in the beginning and 88.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 376.37ms. Allocated memory is still 123.7MB. Free memory was 87.9MB in the beginning and 77.1MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1883.30ms. Allocated memory is still 123.7MB. Free memory was 76.4MB in the beginning and 56.0MB in the end (delta: 20.4MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Witness Printer took 54.76ms. Allocated memory is still 123.7MB. Free memory was 56.0MB in the beginning and 53.0MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 6]: 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 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 65 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 111 IncrementalHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 21 mSDtfsCounter, 111 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 22, 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, 7 LocationsWithAnnotation, 14 PreInvPairs, 16 NumberOfFragments, 85 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 221 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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: 534]: Loop Invariant Derived loop invariant: dev == 0 && head == dev RESULT: Ultimate proved your program to be correct! [2021-11-23 03:02:08,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6cbd2e6-4944-4980-91fc-dabd591846a5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE