./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label46.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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/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 6c9ef72945147e4ae81caf50df56c252d6632fa10df84ba86d26e6872e2ab991 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:51:58,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:51:58,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:51:58,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:51:58,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:51:58,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:51:58,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:51:58,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:51:58,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:51:58,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:51:58,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:51:58,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:51:58,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:51:58,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:51:58,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:51:58,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:51:58,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:51:58,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:51:58,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:51:58,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:51:58,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:51:58,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:51:58,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:51:58,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:51:58,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:51:58,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:51:58,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:51:58,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:51:58,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:51:58,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:51:58,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:51:58,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:51:58,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:51:58,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:51:58,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:51:58,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:51:58,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:51:58,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:51:58,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:51:58,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:51:58,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:51:58,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:51:58,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:51:58,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:51:58,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:51:58,553 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:51:58,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:51:58,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:51:58,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:51:58,554 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:51:58,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:51:58,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:51:58,559 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:51:58,560 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:51:58,560 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:51:58,560 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:51:58,561 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:51:58,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:51:58,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:51:58,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:51:58,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:51:58,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:51:58,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:51:58,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:51:58,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:51:58,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:51:58,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:51:58,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:51:58,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:51:58,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:51:58,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:51:58,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:51:58,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:51:58,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:51:58,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:51:58,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:51:58,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:51:58,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:51:58,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:51:58,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:51:58,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:51:58,570 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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c9ef72945147e4ae81caf50df56c252d6632fa10df84ba86d26e6872e2ab991 [2021-10-29 05:51:58,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:51:58,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:51:58,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:51:58,898 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:51:58,899 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:51:58,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/eca-rers2012/Problem02_label46.c [2021-10-29 05:51:59,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/data/cdfc721d5/7f538a07a7424176a92b29e95ecb81c3/FLAG6c4bf74f1 [2021-10-29 05:51:59,788 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:51:59,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/sv-benchmarks/c/eca-rers2012/Problem02_label46.c [2021-10-29 05:51:59,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/data/cdfc721d5/7f538a07a7424176a92b29e95ecb81c3/FLAG6c4bf74f1 [2021-10-29 05:52:00,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/data/cdfc721d5/7f538a07a7424176a92b29e95ecb81c3 [2021-10-29 05:52:00,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:52:00,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:52:00,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:00,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:52:00,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:52:00,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53674f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00, skipping insertion in model container [2021-10-29 05:52:00,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:52:00,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:52:00,401 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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/sv-benchmarks/c/eca-rers2012/Problem02_label46.c[18150,18163] [2021-10-29 05:52:00,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:00,485 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:52:00,647 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_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/sv-benchmarks/c/eca-rers2012/Problem02_label46.c[18150,18163] [2021-10-29 05:52:00,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:52:00,676 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:52:00,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00 WrapperNode [2021-10-29 05:52:00,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:52:00,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:00,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:52:00,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:52:00,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:52:00,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:52:00,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:52:00,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:52:00,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:52:00,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:52:00,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:52:00,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:52:00,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (1/1) ... [2021-10-29 05:52:00,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:52:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:00,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:52:00,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:52:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:52:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:52:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:52:00,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:52:03,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:52:03,133 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-29 05:52:03,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:03 BoogieIcfgContainer [2021-10-29 05:52:03,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:52:03,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:52:03,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:52:03,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:52:03,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:52:00" (1/3) ... [2021-10-29 05:52:03,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b562763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:03, skipping insertion in model container [2021-10-29 05:52:03,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:52:00" (2/3) ... [2021-10-29 05:52:03,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b562763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:52:03, skipping insertion in model container [2021-10-29 05:52:03,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:03" (3/3) ... [2021-10-29 05:52:03,148 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label46.c [2021-10-29 05:52:03,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:52:03,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:52:03,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:52:03,232 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 05:52:03,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:52:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 05:52:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-29 05:52:03,262 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:03,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:03,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1814579479, now seen corresponding path program 1 times [2021-10-29 05:52:03,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:03,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783888611] [2021-10-29 05:52:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:03,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:03,814 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 05:52:03,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:03,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783888611] [2021-10-29 05:52:03,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783888611] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:03,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:03,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:52:03,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583710479] [2021-10-29 05:52:03,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:03,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:03,854 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 05:52:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:04,385 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-29 05:52:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-10-29 05:52:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:04,400 INFO L225 Difference]: With dead ends: 251 [2021-10-29 05:52:04,401 INFO L226 Difference]: Without dead ends: 163 [2021-10-29 05:52:04,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:52:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-29 05:52:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-29 05:52:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5617283950617284) internal successors, (253), 162 states have internal predecessors, (253), 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 05:52:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 253 transitions. [2021-10-29 05:52:04,480 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 253 transitions. Word has length 80 [2021-10-29 05:52:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:04,482 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 253 transitions. [2021-10-29 05:52:04,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 05:52:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 253 transitions. [2021-10-29 05:52:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-29 05:52:04,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:04,491 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:52:04,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -483701446, now seen corresponding path program 1 times [2021-10-29 05:52:04,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:04,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834097844] [2021-10-29 05:52:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:04,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:04,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834097844] [2021-10-29 05:52:04,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834097844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:52:04,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523162236] [2021-10-29 05:52:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:04,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:04,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:52:04,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:52:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:52:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:52:05,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:52:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523162236] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:05,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:52:05,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-10-29 05:52:05,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678045037] [2021-10-29 05:52:05,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:05,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:05,561 INFO L87 Difference]: Start difference. First operand 163 states and 253 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 05:52:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:05,955 INFO L93 Difference]: Finished difference Result 485 states and 756 transitions. [2021-10-29 05:52:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:05,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 85 [2021-10-29 05:52:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:05,960 INFO L225 Difference]: With dead ends: 485 [2021-10-29 05:52:05,960 INFO L226 Difference]: Without dead ends: 323 [2021-10-29 05:52:05,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-29 05:52:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-29 05:52:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5) internal successors, (483), 322 states have internal predecessors, (483), 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 05:52:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 483 transitions. [2021-10-29 05:52:05,985 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 483 transitions. Word has length 85 [2021-10-29 05:52:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:05,986 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 483 transitions. [2021-10-29 05:52:05,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 05:52:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 483 transitions. [2021-10-29 05:52:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-29 05:52:05,992 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:05,992 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:06,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:06,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:06,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1659811025, now seen corresponding path program 1 times [2021-10-29 05:52:06,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:06,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597634005] [2021-10-29 05:52:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:06,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:06,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:06,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597634005] [2021-10-29 05:52:06,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597634005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:06,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:06,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:06,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517084664] [2021-10-29 05:52:06,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:06,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:06,281 INFO L87 Difference]: Start difference. First operand 323 states and 483 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 05:52:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:06,646 INFO L93 Difference]: Finished difference Result 805 states and 1261 transitions. [2021-10-29 05:52:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-10-29 05:52:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:06,650 INFO L225 Difference]: With dead ends: 805 [2021-10-29 05:52:06,650 INFO L226 Difference]: Without dead ends: 483 [2021-10-29 05:52:06,652 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 05:52:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-29 05:52:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-10-29 05:52:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.3983402489626555) internal successors, (674), 482 states have internal predecessors, (674), 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 05:52:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 674 transitions. [2021-10-29 05:52:06,699 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 674 transitions. Word has length 89 [2021-10-29 05:52:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:06,699 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 674 transitions. [2021-10-29 05:52:06,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 05:52:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 674 transitions. [2021-10-29 05:52:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-29 05:52:06,706 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:06,706 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:06,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:52:06,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:06,707 INFO L85 PathProgramCache]: Analyzing trace with hash -80522247, now seen corresponding path program 1 times [2021-10-29 05:52:06,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:06,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479083739] [2021-10-29 05:52:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:06,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:06,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:06,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479083739] [2021-10-29 05:52:06,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479083739] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:06,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:06,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:06,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326368148] [2021-10-29 05:52:06,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:06,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:06,773 INFO L87 Difference]: Start difference. First operand 483 states and 674 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 05:52:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:07,174 INFO L93 Difference]: Finished difference Result 1285 states and 1834 transitions. [2021-10-29 05:52:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2021-10-29 05:52:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:07,183 INFO L225 Difference]: With dead ends: 1285 [2021-10-29 05:52:07,183 INFO L226 Difference]: Without dead ends: 803 [2021-10-29 05:52:07,184 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 05:52:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-29 05:52:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2021-10-29 05:52:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.3017456359102244) internal successors, (1044), 802 states have internal predecessors, (1044), 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 05:52:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1044 transitions. [2021-10-29 05:52:07,212 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1044 transitions. Word has length 93 [2021-10-29 05:52:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:07,212 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1044 transitions. [2021-10-29 05:52:07,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 05:52:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1044 transitions. [2021-10-29 05:52:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-29 05:52:07,220 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:07,221 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:07,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:52:07,221 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash 703490294, now seen corresponding path program 1 times [2021-10-29 05:52:07,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:07,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418131219] [2021-10-29 05:52:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:07,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 05:52:07,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:07,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418131219] [2021-10-29 05:52:07,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418131219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:07,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:07,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:52:07,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437417266] [2021-10-29 05:52:07,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:07,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:07,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:07,312 INFO L87 Difference]: Start difference. First operand 803 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 05:52:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:07,700 INFO L93 Difference]: Finished difference Result 2085 states and 2754 transitions. [2021-10-29 05:52:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 95 [2021-10-29 05:52:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:07,709 INFO L225 Difference]: With dead ends: 2085 [2021-10-29 05:52:07,709 INFO L226 Difference]: Without dead ends: 1283 [2021-10-29 05:52:07,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:52:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-10-29 05:52:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-10-29 05:52:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.2644305772230888) internal successors, (1621), 1282 states have internal predecessors, (1621), 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 05:52:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1621 transitions. [2021-10-29 05:52:07,756 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1621 transitions. Word has length 95 [2021-10-29 05:52:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1621 transitions. [2021-10-29 05:52:07,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 05:52:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1621 transitions. [2021-10-29 05:52:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-29 05:52:07,766 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:07,766 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:07,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:52:07,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -985386589, now seen corresponding path program 1 times [2021-10-29 05:52:07,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:07,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86197493] [2021-10-29 05:52:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:07,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:07,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:07,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86197493] [2021-10-29 05:52:07,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86197493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:52:07,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968179347] [2021-10-29 05:52:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:07,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:07,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:52:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:52:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:52:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:08,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:08,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968179347] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:08,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:52:08,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-29 05:52:08,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470347700] [2021-10-29 05:52:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:08,867 INFO L87 Difference]: Start difference. First operand 1283 states and 1621 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:09,287 INFO L93 Difference]: Finished difference Result 3205 states and 4139 transitions. [2021-10-29 05:52:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-10-29 05:52:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:09,297 INFO L225 Difference]: With dead ends: 3205 [2021-10-29 05:52:09,298 INFO L226 Difference]: Without dead ends: 1203 [2021-10-29 05:52:09,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-29 05:52:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-10-29 05:52:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.2279534109816972) internal successors, (1476), 1202 states have internal predecessors, (1476), 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 05:52:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1476 transitions. [2021-10-29 05:52:09,334 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1476 transitions. Word has length 107 [2021-10-29 05:52:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:09,335 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1476 transitions. [2021-10-29 05:52:09,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1476 transitions. [2021-10-29 05:52:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-29 05:52:09,338 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:09,339 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:09,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:09,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:09,552 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1426744713, now seen corresponding path program 1 times [2021-10-29 05:52:09,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:09,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866642538] [2021-10-29 05:52:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:09,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 05:52:09,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866642538] [2021-10-29 05:52:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866642538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:09,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834199957] [2021-10-29 05:52:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:09,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:09,599 INFO L87 Difference]: Start difference. First operand 1203 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 05:52:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:09,945 INFO L93 Difference]: Finished difference Result 2405 states and 2951 transitions. [2021-10-29 05:52:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:09,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 114 [2021-10-29 05:52:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:09,953 INFO L225 Difference]: With dead ends: 2405 [2021-10-29 05:52:09,953 INFO L226 Difference]: Without dead ends: 1203 [2021-10-29 05:52:09,955 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 05:52:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-29 05:52:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-10-29 05:52:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.194675540765391) internal successors, (1436), 1202 states have internal predecessors, (1436), 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 05:52:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1436 transitions. [2021-10-29 05:52:09,988 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1436 transitions. Word has length 114 [2021-10-29 05:52:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:09,989 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1436 transitions. [2021-10-29 05:52:09,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 05:52:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1436 transitions. [2021-10-29 05:52:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-29 05:52:09,994 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:09,995 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:09,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:52:09,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1413215369, now seen corresponding path program 1 times [2021-10-29 05:52:09,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:09,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622953696] [2021-10-29 05:52:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:09,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 05:52:10,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:10,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622953696] [2021-10-29 05:52:10,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622953696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:10,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:10,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:10,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334454313] [2021-10-29 05:52:10,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:52:10,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:52:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:10,177 INFO L87 Difference]: Start difference. First operand 1203 states and 1436 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 05:52:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:10,712 INFO L93 Difference]: Finished difference Result 2563 states and 3071 transitions. [2021-10-29 05:52:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:52:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 114 [2021-10-29 05:52:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:10,720 INFO L225 Difference]: With dead ends: 2563 [2021-10-29 05:52:10,722 INFO L226 Difference]: Without dead ends: 1283 [2021-10-29 05:52:10,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-10-29 05:52:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-10-29 05:52:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.173946957878315) internal successors, (1505), 1282 states have internal predecessors, (1505), 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 05:52:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1505 transitions. [2021-10-29 05:52:10,766 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1505 transitions. Word has length 114 [2021-10-29 05:52:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:10,767 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1505 transitions. [2021-10-29 05:52:10,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 05:52:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1505 transitions. [2021-10-29 05:52:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-29 05:52:10,776 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:10,776 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:10,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 05:52:10,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 20771839, now seen corresponding path program 1 times [2021-10-29 05:52:10,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:10,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731220409] [2021-10-29 05:52:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:10,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 05:52:10,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:10,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731220409] [2021-10-29 05:52:10,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731220409] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:10,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:10,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:10,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575962323] [2021-10-29 05:52:10,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:10,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:10,858 INFO L87 Difference]: Start difference. First operand 1283 states and 1505 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:11,128 INFO L93 Difference]: Finished difference Result 3045 states and 3653 transitions. [2021-10-29 05:52:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-10-29 05:52:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:11,138 INFO L225 Difference]: With dead ends: 3045 [2021-10-29 05:52:11,138 INFO L226 Difference]: Without dead ends: 1603 [2021-10-29 05:52:11,141 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 05:52:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-10-29 05:52:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2021-10-29 05:52:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 1.181023720349563) internal successors, (1892), 1602 states have internal predecessors, (1892), 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 05:52:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 1892 transitions. [2021-10-29 05:52:11,182 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 1892 transitions. Word has length 118 [2021-10-29 05:52:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:11,183 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 1892 transitions. [2021-10-29 05:52:11,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 1892 transitions. [2021-10-29 05:52:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-29 05:52:11,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:11,187 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 05:52:11,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash -365674049, now seen corresponding path program 1 times [2021-10-29 05:52:11,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:11,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699465572] [2021-10-29 05:52:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:11,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:11,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699465572] [2021-10-29 05:52:11,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699465572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:52:11,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42136712] [2021-10-29 05:52:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:11,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:11,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:52:11,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:52:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:52:11,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:12,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:12,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42136712] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:12,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:52:12,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-29 05:52:12,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060058349] [2021-10-29 05:52:12,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:12,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:12,418 INFO L87 Difference]: Start difference. First operand 1603 states and 1892 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 05:52:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:12,753 INFO L93 Difference]: Finished difference Result 3445 states and 4084 transitions. [2021-10-29 05:52:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-29 05:52:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:12,765 INFO L225 Difference]: With dead ends: 3445 [2021-10-29 05:52:12,765 INFO L226 Difference]: Without dead ends: 1843 [2021-10-29 05:52:12,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:52:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-10-29 05:52:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1843. [2021-10-29 05:52:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 1.1574375678610207) internal successors, (2132), 1842 states have internal predecessors, (2132), 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 05:52:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2132 transitions. [2021-10-29 05:52:12,817 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2132 transitions. Word has length 154 [2021-10-29 05:52:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:12,818 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2132 transitions. [2021-10-29 05:52:12,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 05:52:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2132 transitions. [2021-10-29 05:52:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-29 05:52:12,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:12,824 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:12,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:13,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-29 05:52:13,046 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash 879959639, now seen corresponding path program 1 times [2021-10-29 05:52:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:13,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261974323] [2021-10-29 05:52:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:13,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-29 05:52:13,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:13,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261974323] [2021-10-29 05:52:13,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261974323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:13,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:13,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:52:13,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504802955] [2021-10-29 05:52:13,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:13,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:52:13,127 INFO L87 Difference]: Start difference. First operand 1843 states and 2132 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:13,498 INFO L93 Difference]: Finished difference Result 4085 states and 4770 transitions. [2021-10-29 05:52:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-10-29 05:52:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:13,509 INFO L225 Difference]: With dead ends: 4085 [2021-10-29 05:52:13,509 INFO L226 Difference]: Without dead ends: 2003 [2021-10-29 05:52:13,512 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 05:52:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-10-29 05:52:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2003. [2021-10-29 05:52:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 1.1173826173826173) internal successors, (2237), 2002 states have internal predecessors, (2237), 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 05:52:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2237 transitions. [2021-10-29 05:52:13,562 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2237 transitions. Word has length 157 [2021-10-29 05:52:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:13,562 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 2237 transitions. [2021-10-29 05:52:13,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2237 transitions. [2021-10-29 05:52:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-29 05:52:13,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:13,567 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:13,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 05:52:13,568 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash -360303544, now seen corresponding path program 1 times [2021-10-29 05:52:13,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:13,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911495640] [2021-10-29 05:52:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:13,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:52:13,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:13,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911495640] [2021-10-29 05:52:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911495640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:52:13,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481823428] [2021-10-29 05:52:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:13,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:13,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:13,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:52:13,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:52:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:52:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:14,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:52:14,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481823428] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:14,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:52:14,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-29 05:52:14,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219756378] [2021-10-29 05:52:14,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:14,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:14,685 INFO L87 Difference]: Start difference. First operand 2003 states and 2237 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 05:52:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:15,023 INFO L93 Difference]: Finished difference Result 4325 states and 4828 transitions. [2021-10-29 05:52:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 166 [2021-10-29 05:52:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:15,039 INFO L225 Difference]: With dead ends: 4325 [2021-10-29 05:52:15,040 INFO L226 Difference]: Without dead ends: 2003 [2021-10-29 05:52:15,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-10-29 05:52:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1923. [2021-10-29 05:52:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 1.0972944849115505) internal successors, (2109), 1922 states have internal predecessors, (2109), 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 05:52:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2109 transitions. [2021-10-29 05:52:15,099 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2109 transitions. Word has length 166 [2021-10-29 05:52:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 2109 transitions. [2021-10-29 05:52:15,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 05:52:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2109 transitions. [2021-10-29 05:52:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-29 05:52:15,106 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:15,106 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:15,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:15,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:15,332 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1499414967, now seen corresponding path program 1 times [2021-10-29 05:52:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:15,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530842942] [2021-10-29 05:52:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:15,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-29 05:52:15,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:15,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530842942] [2021-10-29 05:52:15,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530842942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:15,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:15,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:52:15,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338880901] [2021-10-29 05:52:15,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:52:15,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:52:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:15,488 INFO L87 Difference]: Start difference. First operand 1923 states and 2109 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 05:52:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:15,850 INFO L93 Difference]: Finished difference Result 3925 states and 4300 transitions. [2021-10-29 05:52:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:52:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 233 [2021-10-29 05:52:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:15,891 INFO L225 Difference]: With dead ends: 3925 [2021-10-29 05:52:15,891 INFO L226 Difference]: Without dead ends: 2003 [2021-10-29 05:52:15,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-10-29 05:52:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1923. [2021-10-29 05:52:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 1.093652445369407) internal successors, (2102), 1922 states have internal predecessors, (2102), 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 05:52:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2102 transitions. [2021-10-29 05:52:15,944 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2102 transitions. Word has length 233 [2021-10-29 05:52:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:15,945 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 2102 transitions. [2021-10-29 05:52:15,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 05:52:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2102 transitions. [2021-10-29 05:52:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-10-29 05:52:15,951 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:15,952 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:15,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-29 05:52:15,952 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 715902701, now seen corresponding path program 1 times [2021-10-29 05:52:15,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:15,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816577639] [2021-10-29 05:52:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:15,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-10-29 05:52:16,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:16,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816577639] [2021-10-29 05:52:16,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816577639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:16,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:52:16,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:52:16,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717309210] [2021-10-29 05:52:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:52:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:52:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:16,057 INFO L87 Difference]: Start difference. First operand 1923 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 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 05:52:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:16,504 INFO L93 Difference]: Finished difference Result 4005 states and 4376 transitions. [2021-10-29 05:52:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:52:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 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 265 [2021-10-29 05:52:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:16,514 INFO L225 Difference]: With dead ends: 4005 [2021-10-29 05:52:16,515 INFO L226 Difference]: Without dead ends: 1843 [2021-10-29 05:52:16,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:52:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-10-29 05:52:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1843. [2021-10-29 05:52:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 1.0792616720955484) internal successors, (1988), 1842 states have internal predecessors, (1988), 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 05:52:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 1988 transitions. [2021-10-29 05:52:16,561 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 1988 transitions. Word has length 265 [2021-10-29 05:52:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:16,561 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 1988 transitions. [2021-10-29 05:52:16,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 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 05:52:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 1988 transitions. [2021-10-29 05:52:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-10-29 05:52:16,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:52:16,569 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:16,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 05:52:16,569 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:52:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:52:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1978776895, now seen corresponding path program 1 times [2021-10-29 05:52:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:52:16,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112492636] [2021-10-29 05:52:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:16,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:52:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 373 proven. 73 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-29 05:52:16,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:52:16,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112492636] [2021-10-29 05:52:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112492636] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:52:16,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514332191] [2021-10-29 05:52:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:52:16,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:52:16,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:52:16,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:52:16,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:52:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:52:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:52:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:52:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-10-29 05:52:17,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:52:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-10-29 05:52:18,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514332191] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:52:18,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:52:18,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 5 [2021-10-29 05:52:18,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43548124] [2021-10-29 05:52:18,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:52:18,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:52:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:52:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:18,702 INFO L87 Difference]: Start difference. First operand 1843 states and 1988 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 05:52:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:52:18,815 INFO L93 Difference]: Finished difference Result 2323 states and 2498 transitions. [2021-10-29 05:52:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:52:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 297 [2021-10-29 05:52:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:52:18,817 INFO L225 Difference]: With dead ends: 2323 [2021-10-29 05:52:18,817 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 05:52:18,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:52:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 05:52:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 05:52:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:52:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 05:52:18,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 297 [2021-10-29 05:52:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:52:18,824 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 05:52:18,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 05:52:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 05:52:18,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 05:52:18,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:52:18,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:52:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-29 05:52:19,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 05:52:19,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:52:19,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:52:19,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:52:19,430 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-29 05:52:19,430 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-29 05:52:19,430 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-29 05:52:19,431 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-29 05:52:19,432 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L514-1(lines 39 608) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L517-1(lines 39 608) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-29 05:52:19,433 INFO L857 garLoopResultBuilder]: For program point L518(line 518) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-29 05:52:19,434 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-29 05:52:19,435 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 518) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-29 05:52:19,436 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-29 05:52:19,437 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-29 05:52:19,438 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-29 05:52:19,438 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-29 05:52:19,438 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse3 (<= ~a28~0 10)) (.cse5 (<= ~a28~0 9)) (.cse2 (<= ~a11~0 0)) (.cse0 (= ~a17~0 8)) (.cse7 (= ~a25~0 1)) (.cse1 (= ~a21~0 1)) (.cse4 (= ~a19~0 1)) (.cse6 (= ~a11~0 1)) (.cse8 (<= ~a17~0 8)) (.cse9 (<= ~a28~0 7))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 9 ~a28~0) .cse5 .cse6 .cse1 .cse4) (and .cse0 .cse7 .cse6 .cse1 .cse3 .cse4) (and .cse0 .cse7 .cse1 .cse2 .cse4) (<= ~a17~0 7) (and (<= 10 ~a28~0) .cse7 .cse2 .cse3) (and .cse5 .cse8 .cse2) (and .cse0 .cse7 .cse1 .cse4 .cse9) (and .cse6 .cse8 .cse9))) [2021-10-29 05:52:19,438 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-29 05:52:19,438 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-29 05:52:19,439 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-29 05:52:19,439 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-29 05:52:19,439 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-29 05:52:19,439 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-29 05:52:19,439 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-29 05:52:19,442 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-29 05:52:19,443 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 05:52:19,443 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-29 05:52:19,443 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-29 05:52:19,444 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse3 (<= ~a28~0 10)) (.cse5 (<= ~a28~0 9)) (.cse2 (<= ~a11~0 0)) (.cse0 (= ~a17~0 8)) (.cse7 (= ~a25~0 1)) (.cse1 (= ~a21~0 1)) (.cse4 (= ~a19~0 1)) (.cse6 (= ~a11~0 1)) (.cse8 (<= ~a17~0 8)) (.cse9 (<= ~a28~0 7))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 9 ~a28~0) .cse5 .cse6 .cse1 .cse4) (and .cse0 .cse7 .cse6 .cse1 .cse3 .cse4) (and .cse0 .cse7 .cse1 .cse2 .cse4) (<= ~a17~0 7) (and (<= 10 ~a28~0) .cse7 .cse2 .cse3) (and .cse5 .cse8 .cse2) (and .cse0 .cse7 .cse1 .cse4 .cse9) (and .cse6 .cse8 .cse9))) [2021-10-29 05:52:19,444 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-29 05:52:19,444 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-29 05:52:19,445 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-29 05:52:19,446 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-29 05:52:19,447 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-29 05:52:19,450 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:52:19,452 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:52:19,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:52:19 BoogieIcfgContainer [2021-10-29 05:52:19,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:52:19,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:52:19,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:52:19,497 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:52:19,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:52:03" (3/4) ... [2021-10-29 05:52:19,500 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 05:52:19,535 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 115 nodes and edges [2021-10-29 05:52:19,537 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-29 05:52:19,539 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-29 05:52:19,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-29 05:52:19,720 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:52:19,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:52:19,722 INFO L168 Benchmark]: Toolchain (without parser) took 19706.70 ms. Allocated memory was 90.2 MB in the beginning and 220.2 MB in the end (delta: 130.0 MB). Free memory was 59.2 MB in the beginning and 103.9 MB in the end (delta: -44.7 MB). Peak memory consumption was 86.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,722 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:52:19,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.12 ms. Allocated memory is still 90.2 MB. Free memory was 59.0 MB in the beginning and 33.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.20 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 33.4 MB in the beginning and 85.4 MB in the end (delta: -52.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,724 INFO L168 Benchmark]: Boogie Preprocessor took 63.63 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 81.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,724 INFO L168 Benchmark]: RCFGBuilder took 2262.47 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 46.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,725 INFO L168 Benchmark]: TraceAbstraction took 16355.51 ms. Allocated memory was 111.1 MB in the beginning and 220.2 MB in the end (delta: 109.1 MB). Free memory was 46.5 MB in the beginning and 118.6 MB in the end (delta: -72.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,725 INFO L168 Benchmark]: Witness Printer took 224.20 ms. Allocated memory is still 220.2 MB. Free memory was 118.6 MB in the beginning and 103.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:52:19,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 661.12 ms. Allocated memory is still 90.2 MB. Free memory was 59.0 MB in the beginning and 33.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 132.20 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 33.4 MB in the beginning and 85.4 MB in the end (delta: -52.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.63 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 81.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2262.47 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 46.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16355.51 ms. Allocated memory was 111.1 MB in the beginning and 220.2 MB in the end (delta: 109.1 MB). Free memory was 46.5 MB in the beginning and 118.6 MB in the end (delta: -72.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. * Witness Printer took 224.20 ms. Allocated memory is still 220.2 MB. Free memory was 118.6 MB in the beginning and 103.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 518]: 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, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.2s, OverallIterations: 15, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1325 SDtfs, 962 SDslu, 96 SDs, 0 SdLazy, 3781 SolverSat, 826 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1657 GetRequests, 1623 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2003occurred in iteration=11, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 160 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 61 NumberOfFragments, 247 HoareAnnotationTreeSize, 3 FomulaSimplifications, 598 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 236 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2976 NumberOfCodeBlocks, 2976 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 3760 ConstructedInterpolants, 0 QuantifiedInterpolants, 12260 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1781 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 25 InterpolantComputations, 20 PerfectInterpolantSequences, 3363/3488 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: 616]: Loop Invariant Derived loop invariant: (((((((((((a17 == 8 && a21 == 1) && a11 <= 0) && a28 <= 10) && a19 == 1) || (((((a17 == 8 && 9 <= a28) && a28 <= 9) && a11 == 1) && a21 == 1) && a19 == 1)) || (((((a17 == 8 && a25 == 1) && a11 == 1) && a21 == 1) && a28 <= 10) && a19 == 1)) || ((((a17 == 8 && a25 == 1) && a21 == 1) && a11 <= 0) && a19 == 1)) || a17 <= 7) || (((10 <= a28 && a25 == 1) && a11 <= 0) && a28 <= 10)) || ((a28 <= 9 && a17 <= 8) && a11 <= 0)) || ((((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1) && a28 <= 7)) || ((a11 == 1 && a17 <= 8) && a28 <= 7) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((a17 == 8 && a21 == 1) && a11 <= 0) && a28 <= 10) && a19 == 1) || (((((a17 == 8 && 9 <= a28) && a28 <= 9) && a11 == 1) && a21 == 1) && a19 == 1)) || (((((a17 == 8 && a25 == 1) && a11 == 1) && a21 == 1) && a28 <= 10) && a19 == 1)) || ((((a17 == 8 && a25 == 1) && a21 == 1) && a11 <= 0) && a19 == 1)) || a17 <= 7) || (((10 <= a28 && a25 == 1) && a11 <= 0) && a28 <= 10)) || ((a28 <= 9 && a17 <= 8) && a11 <= 0)) || ((((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1) && a28 <= 7)) || ((a11 == 1 && a17 <= 8) && a28 <= 7) RESULT: Ultimate proved your program to be correct! [2021-10-29 05:52:19,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761b9133-2fe8-4e79-b7e4-5455e0a7fba6/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...