./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Addition01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7 --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 4af9e26294eb81d37b6ccb692d0b40e4bed5b0d6d3dd72d6af1a80634692c297 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:54:44,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:54:45,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:54:45,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:54:45,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:54:45,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:54:45,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:54:45,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:54:45,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:54:45,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:54:45,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:54:45,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:54:45,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:54:45,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:54:45,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:54:45,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:54:45,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:54:45,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:54:45,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:54:45,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:54:45,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:54:45,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:54:45,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:54:45,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:54:45,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:54:45,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:54:45,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:54:45,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:54:45,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:54:45,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:54:45,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:54:45,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:54:45,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:54:45,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:54:45,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:54:45,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:54:45,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:54:45,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:54:45,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:54:45,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:54:45,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:54:45,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:54:45,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:54:45,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:54:45,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:54:45,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:54:45,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:54:45,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:54:45,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:54:45,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:54:45,238 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:54:45,239 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:54:45,240 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:54:45,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:54:45,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:54:45,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:54:45,241 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:54:45,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:54:45,241 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:54:45,241 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:54:45,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:54:45,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:54:45,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:54:45,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:54:45,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:54:45,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:54:45,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:54:45,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:54:45,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:54:45,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:54:45,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:54:45,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:54:45,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:54:45,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:54:45,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:54:45,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:54:45,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:54:45,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:54:45,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:54:45,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:54:45,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:54:45,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:54:45,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:54:45,248 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_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4af9e26294eb81d37b6ccb692d0b40e4bed5b0d6d3dd72d6af1a80634692c297 [2021-11-25 17:54:45,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:54:45,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:54:45,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:54:45,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:54:45,595 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:54:45,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/recursive/Addition01-2.c [2021-11-25 17:54:45,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/data/7d4293c86/714a4131d99d49368af715d601b7734b/FLAG85f21f035 [2021-11-25 17:54:46,207 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:54:46,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/sv-benchmarks/c/recursive/Addition01-2.c [2021-11-25 17:54:46,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/data/7d4293c86/714a4131d99d49368af715d601b7734b/FLAG85f21f035 [2021-11-25 17:54:46,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/data/7d4293c86/714a4131d99d49368af715d601b7734b [2021-11-25 17:54:46,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:54:46,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:54:46,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:54:46,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:54:46,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:54:46,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f01613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46, skipping insertion in model container [2021-11-25 17:54:46,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:54:46,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:54:46,818 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_65f4327f-f231-4f80-9de8-2a8c925747ad/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2021-11-25 17:54:46,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:54:46,830 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:54:46,845 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_65f4327f-f231-4f80-9de8-2a8c925747ad/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2021-11-25 17:54:46,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:54:46,859 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:54:46,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46 WrapperNode [2021-11-25 17:54:46,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:54:46,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:54:46,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:54:46,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:54:46,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,891 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-25 17:54:46,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:54:46,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:54:46,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:54:46,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:54:46,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:54:46,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:54:46,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:54:46,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:54:46,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2021-11-25 17:54:46,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:54:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:46,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:54:46,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:54:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-11-25 17:54:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-11-25 17:54:47,052 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:54:47,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:54:47,237 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:54:47,249 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:54:47,249 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:54:47,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:47 BoogieIcfgContainer [2021-11-25 17:54:47,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:54:47,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:54:47,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:54:47,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:54:47,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:54:46" (1/3) ... [2021-11-25 17:54:47,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fef9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:47, skipping insertion in model container [2021-11-25 17:54:47,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (2/3) ... [2021-11-25 17:54:47,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fef9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:47, skipping insertion in model container [2021-11-25 17:54:47,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:47" (3/3) ... [2021-11-25 17:54:47,267 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2021-11-25 17:54:47,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:54:47,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:54:47,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:54:47,353 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 [2021-11-25 17:54:47,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:54:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 17:54:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:54:47,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:47,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:47,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash 731430453, now seen corresponding path program 1 times [2021-11-25 17:54:47,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:47,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96533165] [2021-11-25 17:54:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:47,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:47,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96533165] [2021-11-25 17:54:47,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96533165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:54:47,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:54:47,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:54:47,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178487331] [2021-11-25 17:54:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:54:47,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:54:47,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:54:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:54:47,865 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 17:54:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:48,082 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-11-25 17:54:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:54:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 17:54:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:48,109 INFO L225 Difference]: With dead ends: 30 [2021-11-25 17:54:48,109 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 17:54:48,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:54:48,117 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:48,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:54:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 17:54:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 17:54:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 17:54:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-25 17:54:48,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-11-25 17:54:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:48,172 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-25 17:54:48,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 17:54:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-25 17:54:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:54:48,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:48,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:48,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:54:48,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1703056242, now seen corresponding path program 1 times [2021-11-25 17:54:48,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:48,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925380713] [2021-11-25 17:54:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:48,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:48,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:48,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925380713] [2021-11-25 17:54:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925380713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:54:48,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:54:48,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:54:48,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336911853] [2021-11-25 17:54:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:54:48,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:54:48,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:48,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:54:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:54:48,265 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 17:54:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:48,297 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-11-25 17:54:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:54:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 17:54:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:48,300 INFO L225 Difference]: With dead ends: 30 [2021-11-25 17:54:48,300 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 17:54:48,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:54:48,307 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:48,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:54:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 17:54:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-25 17:54:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 17:54:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-25 17:54:48,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-11-25 17:54:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:48,327 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-25 17:54:48,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 17:54:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-25 17:54:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:54:48,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:48,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:48,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:54:48,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:48,333 INFO L85 PathProgramCache]: Analyzing trace with hash 280210265, now seen corresponding path program 1 times [2021-11-25 17:54:48,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985509660] [2021-11-25 17:54:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:48,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:48,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985509660] [2021-11-25 17:54:48,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985509660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:54:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801116695] [2021-11-25 17:54:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:48,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:48,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:48,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:48,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:54:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 17:54:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:49,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:49,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801116695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:49,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915952600] [2021-11-25 17:54:49,521 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:54:49,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:54:49,527 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 17:54:49,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:49,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-11-25 17:54:49,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579935639] [2021-11-25 17:54:49,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:49,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 17:54:49,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 17:54:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-25 17:54:49,535 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 17:54:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:49,807 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-25 17:54:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 17:54:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2021-11-25 17:54:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:49,810 INFO L225 Difference]: With dead ends: 34 [2021-11-25 17:54:49,810 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 17:54:49,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-11-25 17:54:49,812 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:49,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 75 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:54:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 17:54:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-25 17:54:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 17:54:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-25 17:54:49,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-11-25 17:54:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:49,820 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-25 17:54:49,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 17:54:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-25 17:54:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 17:54:49,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:49,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:49,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:50,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1340673215, now seen corresponding path program 1 times [2021-11-25 17:54:50,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712491848] [2021-11-25 17:54:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:50,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:50,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712491848] [2021-11-25 17:54:50,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712491848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:54:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592869180] [2021-11-25 17:54:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:50,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:50,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:50,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:50,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:54:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:54:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:50,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:50,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592869180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177833844] [2021-11-25 17:54:50,364 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:54:50,364 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:54:50,365 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 17:54:50,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:50,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2021-11-25 17:54:50,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759312988] [2021-11-25 17:54:50,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:50,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:54:50,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:54:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:54:50,369 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 17:54:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:50,423 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-11-25 17:54:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:54:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2021-11-25 17:54:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:50,424 INFO L225 Difference]: With dead ends: 23 [2021-11-25 17:54:50,425 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 17:54:50,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:54:50,426 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:54:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 17:54:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 17:54:50,428 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) [2021-11-25 17:54:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 17:54:50,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-11-25 17:54:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:50,429 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 17:54:50,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 17:54:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 17:54:50,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 17:54:50,432 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 17:54:50,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:50,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:50,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 17:54:50,692 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 17:54:50,692 INFO L858 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2021-11-25 17:54:50,692 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 17:54:50,692 INFO L861 garLoopResultBuilder]: At program point L28(lines 28 47) the Hoare annotation is: true [2021-11-25 17:54:50,692 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (<= 0 |ULTIMATE.start_main_~n~0#1|) [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 40) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L854 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (+ addition_~n addition_~m)) (.cse0 (+ |addition_#in~n| |addition_#in~m|))) (and (<= (+ addition_~n 1) 0) (= |addition_#in~n| addition_~n) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L22(lines 22 24) no Hoare annotation was computed. [2021-11-25 17:54:50,693 INFO L858 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-11-25 17:54:50,694 INFO L858 garLoopResultBuilder]: For program point additionFINAL(lines 15 25) no Hoare annotation was computed. [2021-11-25 17:54:50,694 INFO L854 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ addition_~n addition_~m)) (.cse0 (+ |addition_#in~n| |addition_#in~m|))) (and (= |addition_#in~n| addition_~n) (< 0 addition_~n) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2021-11-25 17:54:50,694 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2021-11-25 17:54:50,694 INFO L858 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-11-25 17:54:50,694 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-11-25 17:54:50,694 INFO L861 garLoopResultBuilder]: At program point additionENTRY(lines 15 25) the Hoare annotation is: true [2021-11-25 17:54:50,694 INFO L858 garLoopResultBuilder]: For program point additionEXIT(lines 15 25) no Hoare annotation was computed. [2021-11-25 17:54:50,697 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-25 17:54:50,698 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 17:54:50,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:54:50 BoogieIcfgContainer [2021-11-25 17:54:50,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 17:54:50,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 17:54:50,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 17:54:50,704 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 17:54:50,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:47" (3/4) ... [2021-11-25 17:54:50,707 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 17:54:50,713 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2021-11-25 17:54:50,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-25 17:54:50,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 17:54:50,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 17:54:50,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 17:54:50,748 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 17:54:50,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 17:54:50,749 INFO L158 Benchmark]: Toolchain (without parser) took 4163.93ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 88.8MB in the beginning and 97.4MB in the end (delta: -8.6MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,749 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory was 40.2MB in the beginning and 40.1MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 17:54:50,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.69ms. Allocated memory is still 121.6MB. Free memory was 88.6MB in the beginning and 97.9MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.69ms. Allocated memory is still 121.6MB. Free memory was 97.9MB in the beginning and 96.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,751 INFO L158 Benchmark]: Boogie Preprocessor took 17.69ms. Allocated memory is still 121.6MB. Free memory was 96.7MB in the beginning and 95.8MB in the end (delta: 862.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 17:54:50,751 INFO L158 Benchmark]: RCFGBuilder took 349.41ms. Allocated memory is still 121.6MB. Free memory was 95.4MB in the beginning and 86.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,751 INFO L158 Benchmark]: TraceAbstraction took 3442.17ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 85.7MB in the beginning and 99.5MB in the end (delta: -13.8MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,752 INFO L158 Benchmark]: Witness Printer took 44.71ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 97.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 17:54:50,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory was 40.2MB in the beginning and 40.1MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.69ms. Allocated memory is still 121.6MB. Free memory was 88.6MB in the beginning and 97.9MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.69ms. Allocated memory is still 121.6MB. Free memory was 97.9MB in the beginning and 96.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.69ms. Allocated memory is still 121.6MB. Free memory was 96.7MB in the beginning and 95.8MB in the end (delta: 862.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 349.41ms. Allocated memory is still 121.6MB. Free memory was 95.4MB in the beginning and 86.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3442.17ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 85.7MB in the beginning and 99.5MB in the end (delta: -13.8MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. * Witness Printer took 44.71ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 97.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 45]: 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 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 95 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 183 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 148 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 307 IncrementalHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 57 mSDtfsCounter, 307 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 49 HoareAnnotationTreeSize, 11 FomulaSimplifications, 30 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 652 SizeOfPredicates, 9 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/24 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: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 17:54:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65f4327f-f231-4f80-9de8-2a8c925747ad/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE