./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label18.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw --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 8fcc4bb7cd8f204722096b247511c17cd0d430fd3f99523a22a5bf87d5e044f6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:24:02,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:24:02,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:24:02,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:24:02,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:24:02,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:24:02,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:24:02,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:24:02,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:24:02,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:24:02,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:24:02,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:24:02,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:24:02,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:24:02,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:24:02,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:24:02,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:24:02,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:24:02,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:24:02,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:24:02,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:24:02,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:24:02,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:24:02,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:24:02,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:24:02,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:24:02,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:24:02,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:24:02,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:24:02,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:24:02,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:24:02,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:24:02,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:24:02,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:24:02,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:24:02,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:24:02,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:24:02,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:24:02,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:24:02,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:24:02,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:24:02,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:24:02,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:24:02,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:24:02,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:24:02,299 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:24:02,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:24:02,300 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:24:02,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:24:02,301 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:24:02,308 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:24:02,308 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:24:02,309 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:24:02,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:24:02,310 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:24:02,310 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:24:02,310 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:24:02,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:24:02,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:24:02,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:24:02,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:24:02,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:24:02,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:24:02,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:24:02,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:24:02,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:24:02,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:24:02,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:24:02,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:24:02,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:24:02,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:24:02,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:24:02,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:24:02,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:24:02,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:24:02,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:24:02,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:24:02,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:24:02,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:24:02,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:24:02,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:24:02,317 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_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcc4bb7cd8f204722096b247511c17cd0d430fd3f99523a22a5bf87d5e044f6 [2021-10-20 05:24:02,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:24:02,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:24:02,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:24:02,603 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:24:02,604 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:24:02,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/eca-rers2012/Problem01_label18.c [2021-10-20 05:24:02,686 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/data/3604c4e41/5f1c1c7b50764b45b3a347823df69bb2/FLAG0224178d8 [2021-10-20 05:24:03,306 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:24:03,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/sv-benchmarks/c/eca-rers2012/Problem01_label18.c [2021-10-20 05:24:03,347 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/data/3604c4e41/5f1c1c7b50764b45b3a347823df69bb2/FLAG0224178d8 [2021-10-20 05:24:03,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/data/3604c4e41/5f1c1c7b50764b45b3a347823df69bb2 [2021-10-20 05:24:03,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:24:03,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:24:03,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:24:03,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:24:03,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:24:03,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:24:03" (1/1) ... [2021-10-20 05:24:03,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2969c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:03, skipping insertion in model container [2021-10-20 05:24:03,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:24:03" (1/1) ... [2021-10-20 05:24:03,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:24:03,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:24:04,082 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/sv-benchmarks/c/eca-rers2012/Problem01_label18.c[17985,17998] [2021-10-20 05:24:04,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:24:04,148 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:24:04,268 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/sv-benchmarks/c/eca-rers2012/Problem01_label18.c[17985,17998] [2021-10-20 05:24:04,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:24:04,301 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:24:04,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04 WrapperNode [2021-10-20 05:24:04,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:24:04,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:24:04,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:24:04,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:24:04,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:24:04,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:24:04,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:24:04,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:24:04,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:24:04,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:24:04,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:24:04,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:24:04,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (1/1) ... [2021-10-20 05:24:04,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:24:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:24:04,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:24:04,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:24:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:24:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:24:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:24:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:24:06,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:24:06,507 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-20 05:24:06,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:24:06 BoogieIcfgContainer [2021-10-20 05:24:06,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:24:06,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:24:06,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:24:06,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:24:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:24:03" (1/3) ... [2021-10-20 05:24:06,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f31a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:24:06, skipping insertion in model container [2021-10-20 05:24:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:24:04" (2/3) ... [2021-10-20 05:24:06,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f31a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:24:06, skipping insertion in model container [2021-10-20 05:24:06,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:24:06" (3/3) ... [2021-10-20 05:24:06,517 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label18.c [2021-10-20 05:24:06,522 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:24:06,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:24:06,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:24:06,577 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 [2021-10-20 05:24:06,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:24:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-20 05:24:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-20 05:24:06,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:06,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:06,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 379021959, now seen corresponding path program 1 times [2021-10-20 05:24:06,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:06,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128968678] [2021-10-20 05:24:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:06,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:24:07,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:07,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128968678] [2021-10-20 05:24:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128968678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:07,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:07,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610222627] [2021-10-20 05:24:07,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:07,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:07,072 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-20 05:24:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:07,532 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-20 05:24:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-20 05:24:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:07,544 INFO L225 Difference]: With dead ends: 224 [2021-10-20 05:24:07,544 INFO L226 Difference]: Without dead ends: 145 [2021-10-20 05:24:07,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-20 05:24:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-20 05:24:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 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) [2021-10-20 05:24:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-20 05:24:07,594 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-20 05:24:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-20 05:24:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-20 05:24:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-20 05:24:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-20 05:24:07,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:07,599 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:07,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:24:07,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -615339750, now seen corresponding path program 1 times [2021-10-20 05:24:07,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:07,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909717700] [2021-10-20 05:24:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:07,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:24:07,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:07,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909717700] [2021-10-20 05:24:07,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909717700] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:07,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:07,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:07,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186594517] [2021-10-20 05:24:07,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:07,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:07,671 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-20 05:24:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:08,019 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-20 05:24:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-20 05:24:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:08,023 INFO L225 Difference]: With dead ends: 431 [2021-10-20 05:24:08,023 INFO L226 Difference]: Without dead ends: 287 [2021-10-20 05:24:08,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-20 05:24:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-20 05:24:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 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) [2021-10-20 05:24:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-20 05:24:08,048 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2021-10-20 05:24:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:08,049 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-20 05:24:08,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-20 05:24:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-20 05:24:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-20 05:24:08,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:08,055 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:08,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:24:08,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:08,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1933829131, now seen corresponding path program 1 times [2021-10-20 05:24:08,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:08,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127934297] [2021-10-20 05:24:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:08,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-20 05:24:08,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:08,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127934297] [2021-10-20 05:24:08,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127934297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:08,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:08,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372784575] [2021-10-20 05:24:08,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:08,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:08,247 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-20 05:24:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:08,567 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-20 05:24:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-20 05:24:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:08,571 INFO L225 Difference]: With dead ends: 715 [2021-10-20 05:24:08,571 INFO L226 Difference]: Without dead ends: 429 [2021-10-20 05:24:08,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-20 05:24:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-20 05:24:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 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) [2021-10-20 05:24:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-20 05:24:08,600 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-20 05:24:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:08,601 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-20 05:24:08,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-20 05:24:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-20 05:24:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-20 05:24:08,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:08,606 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:08,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:24:08,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash 218742463, now seen corresponding path program 1 times [2021-10-20 05:24:08,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:08,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731051604] [2021-10-20 05:24:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:08,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-20 05:24:08,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:08,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731051604] [2021-10-20 05:24:08,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731051604] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:08,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:08,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:08,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962649838] [2021-10-20 05:24:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:08,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:08,687 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-20 05:24:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:08,973 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-20 05:24:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:08,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-20 05:24:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:08,977 INFO L225 Difference]: With dead ends: 715 [2021-10-20 05:24:08,977 INFO L226 Difference]: Without dead ends: 358 [2021-10-20 05:24:08,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-20 05:24:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-20 05:24:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2021-10-20 05:24:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-20 05:24:09,000 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-20 05:24:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:09,001 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-20 05:24:09,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-20 05:24:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-20 05:24:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-20 05:24:09,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:09,004 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:09,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:24:09,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 674876151, now seen corresponding path program 1 times [2021-10-20 05:24:09,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:09,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935786648] [2021-10-20 05:24:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:09,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-20 05:24:09,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:09,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935786648] [2021-10-20 05:24:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935786648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:09,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:09,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:09,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319672575] [2021-10-20 05:24:09,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:09,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:09,070 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-20 05:24:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:09,406 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-20 05:24:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-20 05:24:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:09,411 INFO L225 Difference]: With dead ends: 857 [2021-10-20 05:24:09,412 INFO L226 Difference]: Without dead ends: 500 [2021-10-20 05:24:09,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-20 05:24:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-20 05:24:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 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) [2021-10-20 05:24:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-20 05:24:09,445 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-20 05:24:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:09,446 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-20 05:24:09,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-20 05:24:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-20 05:24:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-20 05:24:09,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:09,451 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:24:09,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash -692385099, now seen corresponding path program 1 times [2021-10-20 05:24:09,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:09,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154729550] [2021-10-20 05:24:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:09,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-20 05:24:09,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:09,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154729550] [2021-10-20 05:24:09,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154729550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:09,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:24:09,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507542233] [2021-10-20 05:24:09,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:09,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:09,581 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-20 05:24:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:09,974 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-20 05:24:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-20 05:24:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:09,981 INFO L225 Difference]: With dead ends: 1354 [2021-10-20 05:24:09,981 INFO L226 Difference]: Without dead ends: 855 [2021-10-20 05:24:09,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-20 05:24:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-20 05:24:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 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) [2021-10-20 05:24:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-20 05:24:10,011 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-20 05:24:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-20 05:24:10,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-20 05:24:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-20 05:24:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-20 05:24:10,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:10,015 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:10,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:24:10,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:10,016 INFO L82 PathProgramCache]: Analyzing trace with hash 240371387, now seen corresponding path program 1 times [2021-10-20 05:24:10,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:10,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4649923] [2021-10-20 05:24:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:10,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-20 05:24:10,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:10,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4649923] [2021-10-20 05:24:10,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4649923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:10,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:10,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:24:10,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548997241] [2021-10-20 05:24:10,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:10,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:10,086 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-20 05:24:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:10,419 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-20 05:24:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:10,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-20 05:24:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:10,424 INFO L225 Difference]: With dead ends: 1354 [2021-10-20 05:24:10,424 INFO L226 Difference]: Without dead ends: 713 [2021-10-20 05:24:10,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-20 05:24:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-20 05:24:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 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) [2021-10-20 05:24:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-20 05:24:10,458 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-20 05:24:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:10,459 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-20 05:24:10,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-20 05:24:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-20 05:24:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-20 05:24:10,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:10,463 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:10,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:24:10,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1229082469, now seen corresponding path program 1 times [2021-10-20 05:24:10,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:10,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685130933] [2021-10-20 05:24:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:10,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-20 05:24:10,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:10,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685130933] [2021-10-20 05:24:10,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685130933] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:10,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:10,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:24:10,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914525158] [2021-10-20 05:24:10,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:24:10,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:24:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:10,567 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-20 05:24:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:11,111 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-20 05:24:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:24:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-20 05:24:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:11,119 INFO L225 Difference]: With dead ends: 1780 [2021-10-20 05:24:11,119 INFO L226 Difference]: Without dead ends: 997 [2021-10-20 05:24:11,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-20 05:24:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2021-10-20 05:24:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.2432432432432432) internal successors, (1150), 925 states have internal predecessors, (1150), 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) [2021-10-20 05:24:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1150 transitions. [2021-10-20 05:24:11,154 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1150 transitions. Word has length 154 [2021-10-20 05:24:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:11,155 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1150 transitions. [2021-10-20 05:24:11,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-20 05:24:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1150 transitions. [2021-10-20 05:24:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-20 05:24:11,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:11,160 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:11,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:24:11,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash -937099911, now seen corresponding path program 1 times [2021-10-20 05:24:11,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:11,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549668965] [2021-10-20 05:24:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:11,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-20 05:24:11,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:11,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549668965] [2021-10-20 05:24:11,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549668965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:11,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:11,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:24:11,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121109332] [2021-10-20 05:24:11,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:24:11,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:24:11,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:11,301 INFO L87 Difference]: Start difference. First operand 926 states and 1150 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-20 05:24:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:11,756 INFO L93 Difference]: Finished difference Result 2064 states and 2553 transitions. [2021-10-20 05:24:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:24:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-10-20 05:24:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:11,763 INFO L225 Difference]: With dead ends: 2064 [2021-10-20 05:24:11,764 INFO L226 Difference]: Without dead ends: 1139 [2021-10-20 05:24:11,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-20 05:24:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 926. [2021-10-20 05:24:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 925 states have internal predecessors, (1108), 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) [2021-10-20 05:24:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1108 transitions. [2021-10-20 05:24:11,825 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1108 transitions. Word has length 177 [2021-10-20 05:24:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1108 transitions. [2021-10-20 05:24:11,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-20 05:24:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1108 transitions. [2021-10-20 05:24:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-20 05:24:11,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:11,830 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:11,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-20 05:24:11,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1287877944, now seen corresponding path program 1 times [2021-10-20 05:24:11,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:11,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868060826] [2021-10-20 05:24:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:11,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-20 05:24:11,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:11,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868060826] [2021-10-20 05:24:11,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868060826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:11,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:24:11,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305055913] [2021-10-20 05:24:11,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:24:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:24:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:11,904 INFO L87 Difference]: Start difference. First operand 926 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-20 05:24:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:12,349 INFO L93 Difference]: Finished difference Result 1922 states and 2305 transitions. [2021-10-20 05:24:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:24:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-10-20 05:24:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:12,358 INFO L225 Difference]: With dead ends: 1922 [2021-10-20 05:24:12,358 INFO L226 Difference]: Without dead ends: 997 [2021-10-20 05:24:12,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:24:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-20 05:24:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-20 05:24:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.180722891566265) internal successors, (1176), 996 states have internal predecessors, (1176), 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) [2021-10-20 05:24:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1176 transitions. [2021-10-20 05:24:12,391 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1176 transitions. Word has length 202 [2021-10-20 05:24:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1176 transitions. [2021-10-20 05:24:12,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-20 05:24:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1176 transitions. [2021-10-20 05:24:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-20 05:24:12,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:12,397 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:12,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-20 05:24:12,398 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 853599609, now seen corresponding path program 1 times [2021-10-20 05:24:12,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:12,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77299617] [2021-10-20 05:24:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:12,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-20 05:24:12,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77299617] [2021-10-20 05:24:12,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77299617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:12,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:12,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:24:12,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926278115] [2021-10-20 05:24:12,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:12,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:12,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:12,514 INFO L87 Difference]: Start difference. First operand 997 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-20 05:24:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:12,811 INFO L93 Difference]: Finished difference Result 2206 states and 2605 transitions. [2021-10-20 05:24:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-10-20 05:24:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:12,820 INFO L225 Difference]: With dead ends: 2206 [2021-10-20 05:24:12,820 INFO L226 Difference]: Without dead ends: 1210 [2021-10-20 05:24:12,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-20 05:24:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-10-20 05:24:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.1687170474516695) internal successors, (1330), 1138 states have internal predecessors, (1330), 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) [2021-10-20 05:24:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1330 transitions. [2021-10-20 05:24:12,877 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1330 transitions. Word has length 220 [2021-10-20 05:24:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:12,877 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1330 transitions. [2021-10-20 05:24:12,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-20 05:24:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1330 transitions. [2021-10-20 05:24:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-20 05:24:12,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:12,884 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:12,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-20 05:24:12,884 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2121149570, now seen corresponding path program 1 times [2021-10-20 05:24:12,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:12,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712461899] [2021-10-20 05:24:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:12,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-20 05:24:13,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:13,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712461899] [2021-10-20 05:24:13,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712461899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:13,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:24:13,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:24:13,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375615975] [2021-10-20 05:24:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:13,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:13,087 INFO L87 Difference]: Start difference. First operand 1139 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-20 05:24:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:13,337 INFO L93 Difference]: Finished difference Result 2490 states and 2888 transitions. [2021-10-20 05:24:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-10-20 05:24:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:13,345 INFO L225 Difference]: With dead ends: 2490 [2021-10-20 05:24:13,345 INFO L226 Difference]: Without dead ends: 1139 [2021-10-20 05:24:13,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:24:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-20 05:24:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-20 05:24:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.1344463971880492) internal successors, (1291), 1138 states have internal predecessors, (1291), 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) [2021-10-20 05:24:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1291 transitions. [2021-10-20 05:24:13,384 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1291 transitions. Word has length 242 [2021-10-20 05:24:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:13,385 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1291 transitions. [2021-10-20 05:24:13,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-20 05:24:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1291 transitions. [2021-10-20 05:24:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-20 05:24:13,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:24:13,391 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:24:13,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-20 05:24:13,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:24:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:24:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1886812207, now seen corresponding path program 1 times [2021-10-20 05:24:13,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:24:13,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296775694] [2021-10-20 05:24:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:13,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:24:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-20 05:24:13,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:24:13,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296775694] [2021-10-20 05:24:13,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296775694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:24:13,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987937171] [2021-10-20 05:24:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:24:13,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:24:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:24:13,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:24:13,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 05:24:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:24:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:24:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:24:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-20 05:24:14,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:24:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-20 05:24:15,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987937171] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:24:15,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:24:15,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-20 05:24:15,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848996745] [2021-10-20 05:24:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:24:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:24:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:24:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:24:15,122 INFO L87 Difference]: Start difference. First operand 1139 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-20 05:24:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:24:15,410 INFO L93 Difference]: Finished difference Result 2204 states and 2506 transitions. [2021-10-20 05:24:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:24:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-10-20 05:24:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:24:15,411 INFO L225 Difference]: With dead ends: 2204 [2021-10-20 05:24:15,412 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:24:15,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:24:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:24:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:24:15,414 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) [2021-10-20 05:24:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:24:15,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2021-10-20 05:24:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:24:15,415 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:24:15,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-20 05:24:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:24:15,416 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:24:15,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:24:15,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 05:24:15,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-20 05:24:15,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 05:24:15,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:24:15,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:24:15,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-20 05:24:15,950 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-20 05:24:15,951 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-20 05:24:15,952 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L482-1(lines 40 585) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-20 05:24:15,953 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse3 (<= 15 ~a8~0)) (.cse4 (<= ~a8~0 13)) (.cse5 (<= ~a16~0 5)) (.cse6 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse2 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3) (and .cse4 .cse0 (<= ~a16~0 4)) (and .cse4 .cse1 .cse5) (and .cse6 .cse0 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse0 .cse5) (and .cse6 .cse0 .cse2))) [2021-10-20 05:24:15,953 INFO L857 garLoopResultBuilder]: For program point L485-1(lines 40 585) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L486(line 486) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-20 05:24:15,954 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-20 05:24:15,955 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-20 05:24:15,956 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-20 05:24:15,956 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse3 (<= 15 ~a8~0)) (.cse4 (<= ~a8~0 13)) (.cse5 (<= ~a16~0 5)) (.cse6 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse2 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3) (and .cse4 .cse0 (<= ~a16~0 4)) (and .cse4 .cse1 .cse5) (and .cse6 .cse0 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse0 .cse5) (and .cse6 .cse0 .cse2))) [2021-10-20 05:24:15,956 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-20 05:24:15,963 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 486) no Hoare annotation was computed. [2021-10-20 05:24:15,963 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-20 05:24:15,963 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-20 05:24:15,963 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-20 05:24:15,964 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-20 05:24:15,964 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-20 05:24:15,964 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-20 05:24:15,968 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:24:16,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:24:16 BoogieIcfgContainer [2021-10-20 05:24:16,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:24:16,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:24:16,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:24:16,007 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:24:16,007 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:24:06" (3/4) ... [2021-10-20 05:24:16,010 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:24:16,041 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 109 nodes and edges [2021-10-20 05:24:16,043 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-20 05:24:16,044 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-20 05:24:16,046 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:24:16,189 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:24:16,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:24:16,191 INFO L168 Benchmark]: Toolchain (without parser) took 12617.68 ms. Allocated memory was 102.8 MB in the beginning and 224.4 MB in the end (delta: 121.6 MB). Free memory was 65.9 MB in the beginning and 159.4 MB in the end (delta: -93.5 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,191 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 55.6 MB in the beginning and 55.6 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:24:16,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.07 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 58.1 MB in the end (delta: 7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.37 ms. Allocated memory is still 102.8 MB. Free memory was 58.1 MB in the beginning and 52.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,193 INFO L168 Benchmark]: Boogie Preprocessor took 138.12 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 52.2 MB in the beginning and 112.1 MB in the end (delta: -59.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,193 INFO L168 Benchmark]: RCFGBuilder took 1964.47 ms. Allocated memory is still 140.5 MB. Free memory was 112.1 MB in the beginning and 71.9 MB in the end (delta: 40.3 MB). Peak memory consumption was 69.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,194 INFO L168 Benchmark]: TraceAbstraction took 9494.13 ms. Allocated memory was 140.5 MB in the beginning and 224.4 MB in the end (delta: 83.9 MB). Free memory was 70.8 MB in the beginning and 174.0 MB in the end (delta: -103.2 MB). Peak memory consumption was 97.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,194 INFO L168 Benchmark]: Witness Printer took 183.24 ms. Allocated memory is still 224.4 MB. Free memory was 174.0 MB in the beginning and 159.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:24:16,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 55.6 MB in the beginning and 55.6 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 729.07 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 58.1 MB in the end (delta: 7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.37 ms. Allocated memory is still 102.8 MB. Free memory was 58.1 MB in the beginning and 52.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 138.12 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 52.2 MB in the beginning and 112.1 MB in the end (delta: -59.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1964.47 ms. Allocated memory is still 140.5 MB. Free memory was 112.1 MB in the beginning and 71.9 MB in the end (delta: 40.3 MB). Peak memory consumption was 69.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9494.13 ms. Allocated memory was 140.5 MB in the beginning and 224.4 MB in the end (delta: 83.9 MB). Free memory was 70.8 MB in the beginning and 174.0 MB in the end (delta: -103.2 MB). Peak memory consumption was 97.3 MB. Max. memory is 16.1 GB. * Witness Printer took 183.24 ms. Allocated memory is still 224.4 MB. Free memory was 174.0 MB in the beginning and 159.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 486]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9399.7ms, OverallIterations: 13, TraceHistogramMax: 7, EmptinessCheckTime: 63.5ms, AutomataDifference: 4906.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 312.6ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 635 SDtfs, 865 SDslu, 61 SDs, 0 SdLazy, 3137 SolverSat, 749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3378.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=11, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 411.0ms AutomataMinimizationTime, 13 MinimizatonAttempts, 639 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 163 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2334 FormulaSimplificationTreeSizeReduction, 77.3ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 260 FormulaSimplificationTreeSizeReductionInter, 228.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 201.6ms SsaConstructionTime, 483.4ms SatisfiabilityAnalysisTime, 2434.0ms InterpolantComputationTime, 2240 NumberOfCodeBlocks, 2240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2480 ConstructedInterpolants, 0 QuantifiedInterpolants, 6164 SizeOfPredicates, 0 NumberOfNonLiveVariables, 487 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2643/2746 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: 593]: Loop Invariant Derived loop invariant: ((((((((a21 == 1 && a17 == 1) && a20 == 1) || ((a21 == 1 && a17 == 1) && 15 <= a8)) || ((a8 <= 13 && a21 == 1) && a16 <= 4)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((a21 == 1 && a17 == 1) && a20 == 1) || ((a21 == 1 && a17 == 1) && 15 <= a8)) || ((a8 <= 13 && a21 == 1) && a16 <= 4)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && 15 <= a8)) || ((a8 <= 13 && a17 <= 0) && a20 == 1)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-20 05:24:16,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd8fc53-a1c5-4065-a307-6a584565f2ea/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...