./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_1b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG --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 de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:26:28,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:26:28,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:26:28,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:26:28,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:26:28,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:26:28,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:26:28,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:26:28,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:26:28,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:26:28,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:26:28,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:26:28,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:26:28,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:26:28,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:26:28,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:26:28,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:26:28,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:26:28,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:26:28,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:26:28,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:26:28,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:26:28,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:26:28,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:26:28,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:26:28,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:26:28,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:26:28,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:26:28,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:26:28,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:26:28,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:26:28,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:26:28,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:26:28,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:26:28,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:26:28,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:26:28,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:26:28,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:26:28,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:26:28,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:26:28,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:26:28,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:26:28,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:26:28,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:26:28,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:26:28,529 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:26:28,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:26:28,529 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:26:28,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:26:28,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:26:28,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:26:28,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:26:28,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:26:28,532 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:26:28,532 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:26:28,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:26:28,532 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:26:28,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:26:28,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:26:28,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:26:28,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:26:28,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:26:28,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:26:28,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:26:28,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:26:28,535 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:26:28,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:26:28,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:26:28,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:26:28,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:26:28,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:26:28,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:26:28,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:26:28,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:26:28,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:26:28,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:26:28,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:26:28,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:26:28,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:26:28,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:26:28,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:26:28,541 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_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 [2021-10-29 05:26:28,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:26:28,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:26:28,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:26:28,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:26:28,825 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:26:28,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-29 05:26:28,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/data/75febd88c/44bcdf65eb414ccfa2117ead6881fdb7/FLAGaeec209f8 [2021-10-29 05:26:29,364 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:26:29,365 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-29 05:26:29,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/data/75febd88c/44bcdf65eb414ccfa2117ead6881fdb7/FLAGaeec209f8 [2021-10-29 05:26:29,779 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/data/75febd88c/44bcdf65eb414ccfa2117ead6881fdb7 [2021-10-29 05:26:29,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:26:29,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:26:29,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:26:29,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:26:29,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:26:29,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:26:29" (1/1) ... [2021-10-29 05:26:29,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a103b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:29, skipping insertion in model container [2021-10-29 05:26:29,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:26:29" (1/1) ... [2021-10-29 05:26:29,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:26:29,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:26:29,958 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-29 05:26:29,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:26:29,986 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:26:29,996 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-29 05:26:29,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:26:30,010 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:26:30,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30 WrapperNode [2021-10-29 05:26:30,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:26:30,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:26:30,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:26:30,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:26:30,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:26:30,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:26:30,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:26:30,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:26:30,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:26:30,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:26:30,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:26:30,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:26:30,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (1/1) ... [2021-10-29 05:26:30,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:26:30,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:26:30,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:26:30,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:26:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:26:30,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:26:30,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:26:30,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:26:30,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:26:30,415 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-29 05:26:30,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:26:30 BoogieIcfgContainer [2021-10-29 05:26:30,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:26:30,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:26:30,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:26:30,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:26:30,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:26:29" (1/3) ... [2021-10-29 05:26:30,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48225378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:26:30, skipping insertion in model container [2021-10-29 05:26:30,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:26:30" (2/3) ... [2021-10-29 05:26:30,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48225378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:26:30, skipping insertion in model container [2021-10-29 05:26:30,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:26:30" (3/3) ... [2021-10-29 05:26:30,429 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1b.c [2021-10-29 05:26:30,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:26:30,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:26:30,478 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:26:30,485 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:26:30,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:26:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:26:30,502 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:26:30,503 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:26:30,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:26:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:26:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1848580, now seen corresponding path program 1 times [2021-10-29 05:26:30,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:26:30,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20778169] [2021-10-29 05:26:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:26:30,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:26:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:26:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:30,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:26:30,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20778169] [2021-10-29 05:26:30,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20778169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:26:30,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:26:30,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:26:30,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565948418] [2021-10-29 05:26:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:26:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:26:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:26:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:26:30,698 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:26:30,721 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-29 05:26:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:26:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-29 05:26:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:26:30,731 INFO L225 Difference]: With dead ends: 13 [2021-10-29 05:26:30,731 INFO L226 Difference]: Without dead ends: 6 [2021-10-29 05:26:30,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:26:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-29 05:26:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-29 05:26:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-29 05:26:30,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-29 05:26:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:26:30,763 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-29 05:26:30,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-29 05:26:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:26:30,763 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:26:30,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:26:30,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:26:30,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:26:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:26:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash 57200258, now seen corresponding path program 1 times [2021-10-29 05:26:30,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:26:30,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524530401] [2021-10-29 05:26:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:26:30,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:26:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:26:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:30,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:26:30,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524530401] [2021-10-29 05:26:30,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524530401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:26:30,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199278846] [2021-10-29 05:26:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:26:30,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:26:30,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:26:30,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:26:30,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:26:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:26:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:26:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:26:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:31,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:26:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:31,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199278846] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:26:31,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079778828] [2021-10-29 05:26:31,099 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-29 05:26:31,099 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:26:31,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:26:31,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:26:31,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:26:31,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,222 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:26:31,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,228 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:26:31,229 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:26:31,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:26:31,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 05:26:31,258 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-29 05:26:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 05:26:31,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:26:31,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:26:31,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:26:31,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:31,410 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-29 05:26:31,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-10-29 05:26:31,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-29 05:26:31,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-29 05:26:31,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:26:31,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-29 05:26:31,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:26:31,462 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:98 [2021-10-29 05:26:31,469 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-10-29 05:26:31,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-29 05:26:31,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:31,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-10-29 05:26:31,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:31,787 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-10-29 05:26:31,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-29 05:26:31,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:26:32,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:26:32,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-29 05:26:32,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-29 05:26:32,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259810674] [2021-10-29 05:26:32,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:26:32,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:26:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:26:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:26:32,020 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:26:32,042 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-10-29 05:26:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:26:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:26:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:26:32,044 INFO L225 Difference]: With dead ends: 12 [2021-10-29 05:26:32,044 INFO L226 Difference]: Without dead ends: 9 [2021-10-29 05:26:32,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:26:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-29 05:26:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-29 05:26:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-29 05:26:32,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-29 05:26:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:26:32,049 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-29 05:26:32,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-29 05:26:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:26:32,051 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:26:32,051 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-29 05:26:32,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:26:32,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:26:32,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:26:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:26:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1154112380, now seen corresponding path program 2 times [2021-10-29 05:26:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:26:32,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537502261] [2021-10-29 05:26:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:26:32,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:26:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:26:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:32,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:26:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537502261] [2021-10-29 05:26:32,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537502261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:26:32,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861813953] [2021-10-29 05:26:32,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:26:32,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:26:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:26:32,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:26:32,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:26:32,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-29 05:26:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:26:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:26:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:26:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:26:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:26:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861813953] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:26:32,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533246475] [2021-10-29 05:26:32,551 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-29 05:26:32,551 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:26:32,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:26:32,552 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:26:32,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:26:32,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,566 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:26:32,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:26:32,574 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:26:32,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:26:32,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 05:26:32,589 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-29 05:26:32,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 05:26:32,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:26:32,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:26:32,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:26:32,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:26:32,672 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-29 05:26:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-10-29 05:26:32,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-29 05:26:32,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-29 05:26:32,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:26:32,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-29 05:26:32,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:26:32,695 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:98 [2021-10-29 05:26:32,699 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-10-29 05:26:32,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-29 05:26:32,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:26:32,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-10-29 05:26:32,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:26:32,863 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-10-29 05:26:32,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-29 05:26:32,873 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:26:33,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:26:33,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-29 05:26:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-10-29 05:26:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564628466] [2021-10-29 05:26:33,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:26:33,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:26:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:26:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:26:33,059 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:26:33,078 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-29 05:26:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:26:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:26:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:26:33,080 INFO L225 Difference]: With dead ends: 14 [2021-10-29 05:26:33,080 INFO L226 Difference]: Without dead ends: 11 [2021-10-29 05:26:33,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:26:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-29 05:26:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-29 05:26:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-29 05:26:33,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-29 05:26:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:26:33,086 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-29 05:26:33,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:26:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-29 05:26:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:26:33,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:26:33,087 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-10-29 05:26:33,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:26:33,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-29 05:26:33,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:26:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:26:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1003817916, now seen corresponding path program 3 times [2021-10-29 05:26:33,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:26:33,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788597331] [2021-10-29 05:26:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:26:33,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:26:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:26:33,318 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:26:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:26:33,351 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:26:33,353 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:26:33,354 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:26:33,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-29 05:26:33,360 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1] [2021-10-29 05:26:33,363 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:26:33,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:26:33 BoogieIcfgContainer [2021-10-29 05:26:33,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:26:33,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:26:33,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:26:33,392 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:26:33,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:26:30" (3/4) ... [2021-10-29 05:26:33,394 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:26:33,449 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:26:33,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:26:33,450 INFO L168 Benchmark]: Toolchain (without parser) took 3666.27 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 66.3 MB in the beginning and 74.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,450 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 82.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:26:33,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.29 ms. Allocated memory is still 102.8 MB. Free memory was 66.1 MB in the beginning and 79.9 MB in the end (delta: -13.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.9 MB in the beginning and 78.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,454 INFO L168 Benchmark]: Boogie Preprocessor took 35.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.6 MB in the beginning and 77.7 MB in the end (delta: 897.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:26:33,455 INFO L168 Benchmark]: RCFGBuilder took 325.37 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 67.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,455 INFO L168 Benchmark]: TraceAbstraction took 2970.92 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 67.3 MB in the beginning and 76.2 MB in the end (delta: -8.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,456 INFO L168 Benchmark]: Witness Printer took 57.63 ms. Allocated memory is still 125.8 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:26:33,459 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 82.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 223.29 ms. Allocated memory is still 102.8 MB. Free memory was 66.1 MB in the beginning and 79.9 MB in the end (delta: -13.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.9 MB in the beginning and 78.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.6 MB in the beginning and 77.7 MB in the end (delta: 897.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 325.37 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 67.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2970.92 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 67.3 MB in the beginning and 76.2 MB in the end (delta: -8.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. * Witness Printer took 57.63 ms. Allocated memory is still 125.8 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.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 - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int a = 6; [L19] a = 0 [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND FALSE !(a < 6) [L22] COND TRUE a == 6 [L23] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 8 SDs, 0 SdLazy, 30 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:26:33,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882afe55-3179-413a-83d6-2f485c24b653/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...