./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3ca1fd1ad8fdbcd9efe7b99bc6e3715231417d253ce4ee9bba3d5969472333a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:36:49,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:36:49,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:36:49,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:36:49,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:36:49,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:36:49,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:36:49,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:36:49,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:36:49,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:36:49,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:36:49,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:36:49,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:36:49,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:36:49,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:36:49,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:36:49,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:36:49,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:36:49,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:36:49,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:36:49,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:36:49,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:36:49,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:36:49,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:36:49,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:36:49,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:36:49,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:36:49,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:36:49,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:36:49,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:36:49,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:36:49,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:36:49,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:36:49,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:36:49,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:36:49,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:36:49,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:36:49,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:36:49,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:36:49,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:36:49,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:36:49,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:36:49,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:36:49,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:36:49,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:36:49,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:36:49,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:36:49,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:36:49,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:36:49,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:36:49,444 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:36:49,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:36:49,445 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:36:49,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:36:49,446 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:36:49,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:36:49,447 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:36:49,447 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:36:49,447 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:36:49,448 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:36:49,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:36:49,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:36:49,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:36:49,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:36:49,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:36:49,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:36:49,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:36:49,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:36:49,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:36:49,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:36:49,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:36:49,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:36:49,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:36:49,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:36:49,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:49,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:36:49,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:36:49,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:36:49,452 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:36:49,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:36:49,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:36:49,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:36:49,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:36:49,453 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_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3ca1fd1ad8fdbcd9efe7b99bc6e3715231417d253ce4ee9bba3d5969472333a [2021-11-25 19:36:49,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:36:49,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:36:49,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:36:49,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:36:49,850 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:36:49,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-invgen/nested9.i [2021-11-25 19:36:49,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/data/4b4786dee/03f1d6529b604ecbb2af8821254f84ad/FLAG232eaa069 [2021-11-25 19:36:50,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:36:50,513 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/sv-benchmarks/c/loop-invgen/nested9.i [2021-11-25 19:36:50,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/data/4b4786dee/03f1d6529b604ecbb2af8821254f84ad/FLAG232eaa069 [2021-11-25 19:36:50,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/data/4b4786dee/03f1d6529b604ecbb2af8821254f84ad [2021-11-25 19:36:50,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:36:50,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:36:50,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:50,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:36:50,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:36:50,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:50" (1/1) ... [2021-11-25 19:36:50,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab5f01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:50, skipping insertion in model container [2021-11-25 19:36:50,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:50" (1/1) ... [2021-11-25 19:36:50,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:36:50,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:36:51,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-11-25 19:36:51,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:51,152 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:36:51,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-11-25 19:36:51,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:51,211 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:36:51,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51 WrapperNode [2021-11-25 19:36:51,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:51,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:51,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:36:51,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:36:51,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,266 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-25 19:36:51,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:51,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:36:51,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:36:51,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:36:51,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:36:51,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:36:51,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:36:51,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:36:51,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (1/1) ... [2021-11-25 19:36:51,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:51,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:36:51,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:36:51,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:36:51,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:36:51,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:36:51,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:36:51,501 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:36:51,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:36:51,661 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:36:51,689 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:36:51,690 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:36:51,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:51 BoogieIcfgContainer [2021-11-25 19:36:51,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:36:51,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:36:51,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:36:51,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:36:51,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:36:50" (1/3) ... [2021-11-25 19:36:51,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdeed48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:51, skipping insertion in model container [2021-11-25 19:36:51,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:51" (2/3) ... [2021-11-25 19:36:51,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdeed48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:51, skipping insertion in model container [2021-11-25 19:36:51,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:51" (3/3) ... [2021-11-25 19:36:51,707 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-11-25 19:36:51,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:36:51,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:36:51,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:36:51,787 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:36:51,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:36:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:36:51,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:51,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:51,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash -130597284, now seen corresponding path program 1 times [2021-11-25 19:36:51,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:51,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595510180] [2021-11-25 19:36:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:51,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:52,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595510180] [2021-11-25 19:36:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595510180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:52,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:52,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:36:52,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333863678] [2021-11-25 19:36:52,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:52,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:36:52,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:36:52,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:36:52,221 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:52,427 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2021-11-25 19:36:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:36:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:36:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:52,440 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:36:52,440 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:36:52,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:36:52,449 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:52,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:36:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:36:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-25 19:36:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-25 19:36:52,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2021-11-25 19:36:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:52,495 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-25 19:36:52,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-25 19:36:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:36:52,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:52,498 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:36:52,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 294637096, now seen corresponding path program 1 times [2021-11-25 19:36:52,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446344313] [2021-11-25 19:36:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:52,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:52,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:52,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446344313] [2021-11-25 19:36:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446344313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:52,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201186021] [2021-11-25 19:36:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:52,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:52,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:52,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:36:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:36:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:52,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:52,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201186021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:53,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:36:53,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-25 19:36:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875972103] [2021-11-25 19:36:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:53,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:36:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:53,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:36:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:36:53,011 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:53,213 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-25 19:36:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:36:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2021-11-25 19:36:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:53,217 INFO L225 Difference]: With dead ends: 32 [2021-11-25 19:36:53,217 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 19:36:53,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:36:53,220 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:53,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:36:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 19:36:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 14. [2021-11-25 19:36:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 19:36:53,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 12 [2021-11-25 19:36:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:53,228 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 19:36:53,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 19:36:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:36:53,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:53,234 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:53,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:53,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 19:36:53,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash 622122465, now seen corresponding path program 1 times [2021-11-25 19:36:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569533272] [2021-11-25 19:36:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:53,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:53,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569533272] [2021-11-25 19:36:53,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569533272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911910841] [2021-11-25 19:36:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:53,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:53,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:53,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:53,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:36:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:36:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:36:53,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911910841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:53,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:36:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-25 19:36:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79427231] [2021-11-25 19:36:53,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:36:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:36:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:36:53,733 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:53,766 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-11-25 19:36:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:36:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2021-11-25 19:36:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:53,769 INFO L225 Difference]: With dead ends: 25 [2021-11-25 19:36:53,769 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:36:53,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:36:53,775 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:53,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:36:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 19:36:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 19:36:53,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2021-11-25 19:36:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:53,789 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 19:36:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 19:36:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:36:53,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:53,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:53,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:53,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:53,996 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1373986155, now seen corresponding path program 1 times [2021-11-25 19:36:53,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733549460] [2021-11-25 19:36:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:53,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:54,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733549460] [2021-11-25 19:36:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733549460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393282263] [2021-11-25 19:36:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:54,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:54,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:54,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:54,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:36:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:36:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:54,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393282263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:54,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070061019] [2021-11-25 19:36:54,427 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:36:54,427 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:54,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:54,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:54,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:55,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:56,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (<= 0 (+ 1000000 |ULTIMATE.start_main_~l~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~k~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1|)) 1 0)) (<= |ULTIMATE.start_main_~l~0#1| 1000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ 1000000 |ULTIMATE.start_main_~m~0#1|)) (<= |ULTIMATE.start_main_~m~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~__BLAST_NONDET~0 0) (<= |ULTIMATE.start_main_~j~0#1| 2) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:56,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:56,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:36:56,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-25 19:36:56,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117830319] [2021-11-25 19:36:56,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:56,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:36:56,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:36:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:36:56,641 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:56,783 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-25 19:36:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:36:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 15 [2021-11-25 19:36:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:56,785 INFO L225 Difference]: With dead ends: 34 [2021-11-25 19:36:56,785 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 19:36:56,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:36:56,787 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:56,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:36:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 19:36:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-25 19:36:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-25 19:36:56,795 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-25 19:36:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:56,796 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-25 19:36:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-25 19:36:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:36:56,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:56,797 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:56,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:57,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:57,022 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -284048417, now seen corresponding path program 1 times [2021-11-25 19:36:57,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:57,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83924687] [2021-11-25 19:36:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:57,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:36:57,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83924687] [2021-11-25 19:36:57,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83924687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201730434] [2021-11-25 19:36:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:57,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:57,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:57,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:36:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:36:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:36:57,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:57,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201730434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:57,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:36:57,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-25 19:36:57,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486285566] [2021-11-25 19:36:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:57,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:36:57,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:36:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:36:57,269 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:57,331 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-11-25 19:36:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:36:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 19 [2021-11-25 19:36:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:57,334 INFO L225 Difference]: With dead ends: 38 [2021-11-25 19:36:57,335 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:36:57,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:36:57,337 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:57,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:36:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 19:36:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 19:36:57,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-11-25 19:36:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:57,358 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 19:36:57,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 19:36:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:36:57,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:57,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:57,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:57,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:57,582 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1219458350, now seen corresponding path program 2 times [2021-11-25 19:36:57,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:57,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555424498] [2021-11-25 19:36:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:57,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:36:57,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555424498] [2021-11-25 19:36:57,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555424498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677139734] [2021-11-25 19:36:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:36:57,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:57,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:57,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:36:57,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:36:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:36:57,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:36:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:36:57,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:36:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677139734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549013359] [2021-11-25 19:36:57,994 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:36:57,995 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:57,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:57,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:57,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:59,177 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:59,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (<= 0 (+ 1000000 |ULTIMATE.start_main_~l~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~k~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1|)) 1 0)) (<= |ULTIMATE.start_main_~l~0#1| 1000000) (<= |ULTIMATE.start_main_~j~0#1| 3000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ 1000000 |ULTIMATE.start_main_~m~0#1|)) (<= |ULTIMATE.start_main_~m~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~__BLAST_NONDET~0 0) (<= |ULTIMATE.start_main_~n~0#1| 1000000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 1000000) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:59,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:59,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:36:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-11-25 19:36:59,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034656411] [2021-11-25 19:36:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:59,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:36:59,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:36:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:36:59,859 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:37:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:00,045 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-25 19:37:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:37:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 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 22 [2021-11-25 19:37:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:00,047 INFO L225 Difference]: With dead ends: 39 [2021-11-25 19:37:00,047 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:37:00,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:37:00,049 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:00,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:37:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:37:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:37:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:37:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:37:00,051 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-11-25 19:37:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:00,051 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:37:00,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:37:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:37:00,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:37:00,055 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:37:00,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:00,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:00,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:37:00,666 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 |ULTIMATE.start_main_~i~0#1|))) (let ((.cse0 (<= .cse2 |ULTIMATE.start_main_~j~0#1|)) (.cse1 (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|))) (or (and .cse0 .cse1 (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 1)) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 (<= |ULTIMATE.start_main_~j~0#1| .cse2) .cse1) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) .cse0 (<= |ULTIMATE.start_main_~j~0#1| (+ (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse1)))) [2021-11-25 19:37:00,666 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-25 19:37:00,666 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-25 19:37:00,666 INFO L854 garLoopResultBuilder]: At program point L36-3(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|)) (.cse1 (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse2 (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|)))) (or (and .cse0 (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse1 .cse2) (and .cse0 (<= |ULTIMATE.start_main_~k~0#1| (div |ULTIMATE.start_main_~j~0#1| 2)) .cse1 .cse2 (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1)))) [2021-11-25 19:37:00,666 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-11-25 19:37:00,666 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:37:00,667 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-25 19:37:00,667 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-11-25 19:37:00,667 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:37:00,667 INFO L861 garLoopResultBuilder]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-11-25 19:37:00,667 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|)) (.cse3 (* 2 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (<= 1 |ULTIMATE.start_main_~i~0#1|)) (.cse2 (<= .cse1 (+ 2 .cse3)))) (or (and .cse0 (<= |ULTIMATE.start_main_~j~0#1| .cse1) .cse2 (<= |ULTIMATE.start_main_~i~0#1| 1)) (= |ULTIMATE.start_main_~i~0#1| 0) (and .cse0 (<= |ULTIMATE.start_main_~j~0#1| (+ .cse3 |ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse2 (<= 2 |ULTIMATE.start_main_~n~0#1|))))) [2021-11-25 19:37:00,667 INFO L858 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2021-11-25 19:37:00,668 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-25 19:37:00,668 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start___VERIFIER_assert_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (< |ULTIMATE.start_main_~j~0#1| (* 3 |ULTIMATE.start_main_~i~0#1|))) [2021-11-25 19:37:00,668 INFO L861 garLoopResultBuilder]: At program point L39(lines 25 40) the Hoare annotation is: true [2021-11-25 19:37:00,672 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-11-25 19:37:00,677 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:37:00,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:37:00 BoogieIcfgContainer [2021-11-25 19:37:00,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:37:00,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:37:00,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:37:00,710 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:37:00,711 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:51" (3/4) ... [2021-11-25 19:37:00,724 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:37:00,735 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-25 19:37:00,735 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 19:37:00,735 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:37:00,736 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:37:00,792 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:37:00,793 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:37:00,793 INFO L158 Benchmark]: Toolchain (without parser) took 9940.75ms. Allocated memory was 90.2MB in the beginning and 180.4MB in the end (delta: 90.2MB). Free memory was 53.1MB in the beginning and 87.3MB in the end (delta: -34.2MB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,794 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 69.2MB in the beginning and 69.1MB in the end (delta: 80.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.45ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 94.6MB in the end (delta: -41.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.80ms. Allocated memory is still 119.5MB. Free memory was 94.6MB in the beginning and 93.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:37:00,795 INFO L158 Benchmark]: Boogie Preprocessor took 45.09ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 92.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,795 INFO L158 Benchmark]: RCFGBuilder took 379.64ms. Allocated memory is still 119.5MB. Free memory was 92.2MB in the beginning and 81.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,796 INFO L158 Benchmark]: TraceAbstraction took 9013.54ms. Allocated memory was 119.5MB in the beginning and 180.4MB in the end (delta: 60.8MB). Free memory was 81.0MB in the beginning and 89.4MB in the end (delta: -8.4MB). Peak memory consumption was 53.8MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,797 INFO L158 Benchmark]: Witness Printer took 83.13ms. Allocated memory is still 180.4MB. Free memory was 89.4MB in the beginning and 87.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:37:00,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 90.2MB. Free memory was 69.2MB in the beginning and 69.1MB in the end (delta: 80.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.45ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 94.6MB in the end (delta: -41.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.80ms. Allocated memory is still 119.5MB. Free memory was 94.6MB in the beginning and 93.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.09ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 92.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 379.64ms. Allocated memory is still 119.5MB. Free memory was 92.2MB in the beginning and 81.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9013.54ms. Allocated memory was 119.5MB in the beginning and 180.4MB in the end (delta: 60.8MB). Free memory was 81.0MB in the beginning and 89.4MB in the end (delta: -8.4MB). Peak memory consumption was 53.8MB. Max. memory is 16.1GB. * Witness Printer took 83.13ms. Allocated memory is still 180.4MB. Free memory was 89.4MB in the beginning and 87.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 161 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 142 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 319 IncrementalHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 47 mSDtfsCounter, 319 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 176 HoareAnnotationTreeSize, 6 FomulaSimplifications, 109 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 1345 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 172 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 668 SizeOfPredicates, 20 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 73/103 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: 17]: Loop Invariant Derived loop invariant: ((2 * i <= j && 1 <= cond) && i < n) && j < 3 * i - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((2 * i <= j && 1 <= cond) && i < n) && j < 3 * i) || (((((2 * i <= j && k <= j / 2) && i < n) && j < 3 * i) && j * -1 / -2 <= k) && i <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && j < 3 * i) && i <= 1) || (((i == 0 && 2 * i <= j) && j <= 2 * i) && i < n)) || ((((1 <= i && 2 * i <= j) && j <= 2 * n + i + 1) && 1 <= cond) && i < n) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((1 <= i && j <= 2 * i) && 2 * i <= 2 + 2 * n) && i <= 1) || i == 0) || ((((1 <= i && j <= 2 * n + i + 1) && 1 <= cond) && 2 * i <= 2 + 2 * n) && 2 <= n) RESULT: Ultimate proved your program to be correct! [2021-11-25 19:37:00,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb994a3-0808-4671-8b16-b33354c1f120/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE