./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:39:53,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:39:53,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:39:53,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:39:53,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:39:53,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:39:53,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:39:53,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:39:53,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:39:53,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:39:53,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:39:53,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:39:53,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:39:53,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:39:53,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:39:53,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:39:53,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:39:53,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:39:53,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:39:53,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:39:53,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:39:53,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:39:53,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:39:53,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:39:53,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:39:53,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:39:53,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:39:53,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:39:53,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:39:53,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:39:53,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:39:53,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:39:53,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:39:53,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:39:53,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:39:53,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:39:53,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:39:53,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:39:53,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:39:53,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:39:53,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:39:53,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:39:53,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:39:53,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:39:53,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:39:53,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:39:53,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:39:53,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:39:53,518 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:39:53,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:39:53,518 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:39:53,519 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:39:53,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:39:53,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:39:53,520 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:39:53,520 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:39:53,521 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:39:53,521 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:39:53,521 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:39:53,521 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:39:53,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:39:53,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:39:53,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:39:53,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:39:53,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:39:53,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:39:53,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:39:53,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:39:53,525 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:39:53,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:39:53,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:39:53,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:39:53,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:39:53,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:39:53,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:39:53,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:39:53,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:39:53,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:39:53,528 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:39:53,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:39:53,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:39:53,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:39:53,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:39:53,529 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_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2021-11-25 19:39:53,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:39:53,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:39:53,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:39:53,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:39:53,837 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:39:53,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-11-25 19:39:53,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/data/aa3214a9b/eb9c1506fe73450493c5b564b66052d8/FLAG564c87004 [2021-11-25 19:39:54,374 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:39:54,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-11-25 19:39:54,382 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/data/aa3214a9b/eb9c1506fe73450493c5b564b66052d8/FLAG564c87004 [2021-11-25 19:39:54,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/data/aa3214a9b/eb9c1506fe73450493c5b564b66052d8 [2021-11-25 19:39:54,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:39:54,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:39:54,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:39:54,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:39:54,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:39:54,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:39:54" (1/1) ... [2021-11-25 19:39:54,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9f6e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:54, skipping insertion in model container [2021-11-25 19:39:54,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:39:54" (1/1) ... [2021-11-25 19:39:54,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:39:54,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:39:54,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-11-25 19:39:54,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:39:55,002 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:39:55,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-11-25 19:39:55,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:39:55,034 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:39:55,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55 WrapperNode [2021-11-25 19:39:55,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:39:55,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:39:55,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:39:55,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:39:55,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,069 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2021-11-25 19:39:55,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:39:55,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:39:55,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:39:55,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:39:55,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:39:55,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:39:55,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:39:55,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:39:55,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (1/1) ... [2021-11-25 19:39:55,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:39:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:55,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:39:55,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:39:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:39:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:39:55,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:39:55,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:39:55,235 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:39:55,236 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:39:55,408 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:39:55,471 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:39:55,471 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:39:55,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:39:55 BoogieIcfgContainer [2021-11-25 19:39:55,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:39:55,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:39:55,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:39:55,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:39:55,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:39:54" (1/3) ... [2021-11-25 19:39:55,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f73ea2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:39:55, skipping insertion in model container [2021-11-25 19:39:55,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:55" (2/3) ... [2021-11-25 19:39:55,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f73ea2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:39:55, skipping insertion in model container [2021-11-25 19:39:55,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:39:55" (3/3) ... [2021-11-25 19:39:55,482 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-11-25 19:39:55,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:39:55,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:39:55,531 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:39:55,538 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:39:55,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:39:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:39:55,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:55,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:39:55,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 108685352, now seen corresponding path program 1 times [2021-11-25 19:39:55,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:55,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298967493] [2021-11-25 19:39:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:55,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:55,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298967493] [2021-11-25 19:39:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298967493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:55,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:39:55,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727635689] [2021-11-25 19:39:55,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:55,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:39:55,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:39:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:39:55,789 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:55,846 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2021-11-25 19:39:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:39:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 19:39:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:55,856 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:39:55,856 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:39:55,859 INFO L932 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 [2021-11-25 19:39:55,863 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:55,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:39:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:39:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-11-25 19:39:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 19:39:55,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 19:39:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:55,895 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 19:39:55,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 19:39:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:39:55,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:55,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:39:55,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:39:55,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash -925984695, now seen corresponding path program 1 times [2021-11-25 19:39:55,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468171534] [2021-11-25 19:39:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:55,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468171534] [2021-11-25 19:39:55,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468171534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:39:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59834264] [2021-11-25 19:39:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:55,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:55,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:39:55,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:39:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:39:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:39:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:56,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:39:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:56,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59834264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:39:56,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733103560] [2021-11-25 19:39:56,183 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:39:56,183 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:39:56,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:39:56,194 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:39:56,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:39:57,113 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:39:58,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:39:58,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:39:58,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:39:58,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-25 19:39:58,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90477448] [2021-11-25 19:39:58,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:39:58,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:39:58,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:39:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:39:58,133 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:58,197 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-25 19:39:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:39:58,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:39:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:58,204 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:39:58,204 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:39:58,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:39:58,210 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:58,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:39:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:39:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-25 19:39:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 19:39:58,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-25 19:39:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:58,221 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 19:39:58,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:39:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 19:39:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:39:58,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:58,223 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-25 19:39:58,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:39:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:58,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash 303425640, now seen corresponding path program 2 times [2021-11-25 19:39:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722927190] [2021-11-25 19:39:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:58,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:58,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722927190] [2021-11-25 19:39:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722927190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:39:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877833741] [2021-11-25 19:39:58,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:39:58,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:58,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:39:58,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:39:58,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:39:58,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:39:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:39:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:39:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:58,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:39:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877833741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:39:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750244494] [2021-11-25 19:39:58,824 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:39:58,824 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:39:58,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:39:58,825 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:39:58,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:39:59,359 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:00,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|)) (and (or (and (or (<= ~SIZE~0 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1))) (= |ULTIMATE.start_main_~d~0#1| 0)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1))) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))))) (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:40:00,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:00,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:00,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-11-25 19:40:00,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725484007] [2021-11-25 19:40:00,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:00,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 19:40:00,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 19:40:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:40:00,407 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:00,536 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-25 19:40:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:40:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:40:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:00,537 INFO L225 Difference]: With dead ends: 28 [2021-11-25 19:40:00,538 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:40:00,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:40:00,540 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:00,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:40:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:40:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-25 19:40:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 19:40:00,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-25 19:40:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:00,545 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 19:40:00,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 19:40:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:40:00,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:00,547 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-25 19:40:00,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:00,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash -431543096, now seen corresponding path program 3 times [2021-11-25 19:40:00,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141267020] [2021-11-25 19:40:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:00,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:00,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:00,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141267020] [2021-11-25 19:40:00,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141267020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:00,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213180935] [2021-11-25 19:40:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:40:00,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:00,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:00,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:40:01,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:40:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:40:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:40:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:01,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:01,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213180935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:01,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978152794] [2021-11-25 19:40:01,519 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:40:01,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:01,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:01,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:01,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:01,990 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:02,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:40:02,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:02,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:02,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-11-25 19:40:02,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990903714] [2021-11-25 19:40:02,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:02,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:40:02,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:40:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:40:02,874 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:03,239 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-25 19:40:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:40:03,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 19:40:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:03,240 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:40:03,240 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 19:40:03,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=938, Invalid=1714, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:40:03,243 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:03,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:40:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 19:40:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-25 19:40:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-25 19:40:03,257 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-25 19:40:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:03,257 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-25 19:40:03,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-25 19:40:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:40:03,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:03,262 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-25 19:40:03,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:03,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-25 19:40:03,482 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1633246600, now seen corresponding path program 4 times [2021-11-25 19:40:03,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:03,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508340220] [2021-11-25 19:40:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:03,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:03,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508340220] [2021-11-25 19:40:03,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508340220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888422078] [2021-11-25 19:40:03,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:40:03,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:03,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:03,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:40:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:40:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:05,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888422078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:05,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325633413] [2021-11-25 19:40:05,276 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:40:05,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:05,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:05,276 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:05,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:05,699 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:06,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:40:06,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:06,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:06,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2021-11-25 19:40:06,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31519669] [2021-11-25 19:40:06,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:06,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-25 19:40:06,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-25 19:40:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=3458, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:40:06,600 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:07,574 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-11-25 19:40:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:40:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 27 [2021-11-25 19:40:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:07,578 INFO L225 Difference]: With dead ends: 82 [2021-11-25 19:40:07,579 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 19:40:07,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3590, Invalid=6310, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 19:40:07,584 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:07,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:40:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 19:40:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-25 19:40:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-25 19:40:07,602 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-25 19:40:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:07,603 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-25 19:40:07,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-25 19:40:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:40:07,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:07,606 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-25 19:40:07,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:07,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:07,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276104, now seen corresponding path program 5 times [2021-11-25 19:40:07,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63652343] [2021-11-25 19:40:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:07,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:08,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63652343] [2021-11-25 19:40:08,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63652343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:08,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882028904] [2021-11-25 19:40:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:40:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:08,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:08,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:40:09,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 19:40:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:40:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:40:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:10,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:12,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882028904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:12,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119111014] [2021-11-25 19:40:12,950 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:40:12,950 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:12,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:12,950 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:12,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:13,342 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:14,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1577#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:40:14,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:14,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:14,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2021-11-25 19:40:14,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113112477] [2021-11-25 19:40:14,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:14,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-25 19:40:14,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-25 19:40:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9378, Invalid=12674, Unknown=0, NotChecked=0, Total=22052 [2021-11-25 19:40:14,164 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:16,870 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2021-11-25 19:40:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-25 19:40:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 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 51 [2021-11-25 19:40:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:16,876 INFO L225 Difference]: With dead ends: 154 [2021-11-25 19:40:16,876 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 19:40:16,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=14078, Invalid=24142, Unknown=0, NotChecked=0, Total=38220 [2021-11-25 19:40:16,888 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:16,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:40:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 19:40:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-25 19:40:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-25 19:40:16,912 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-25 19:40:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-25 19:40:16,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-25 19:40:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:40:16,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:16,916 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-25 19:40:16,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:17,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1760239096, now seen corresponding path program 6 times [2021-11-25 19:40:17,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745456311] [2021-11-25 19:40:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:20,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745456311] [2021-11-25 19:40:20,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745456311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638020942] [2021-11-25 19:40:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:40:20,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:20,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:40:20,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:40:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:40:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 19:40:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:24,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:34,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638020942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:34,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253333931] [2021-11-25 19:40:34,547 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:40:34,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:34,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:34,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:34,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:34,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:35,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3051#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:40:35,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:35,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 288 [2021-11-25 19:40:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884602216] [2021-11-25 19:40:35,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2021-11-25 19:40:35,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2021-11-25 19:40:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37170, Invalid=48386, Unknown=0, NotChecked=0, Total=85556 [2021-11-25 19:40:35,849 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:45,259 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2021-11-25 19:40:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-25 19:40:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 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 99 [2021-11-25 19:40:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:45,264 INFO L225 Difference]: With dead ends: 298 [2021-11-25 19:40:45,264 INFO L226 Difference]: Without dead ends: 198 [2021-11-25 19:40:45,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56525 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=55790, Invalid=94366, Unknown=0, NotChecked=0, Total=150156 [2021-11-25 19:40:45,274 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:45,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:40:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-25 19:40:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-25 19:40:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-25 19:40:45,293 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-25 19:40:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:45,293 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-25 19:40:45,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:40:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-25 19:40:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 19:40:45,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:45,298 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-25 19:40:45,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:45,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1432348680, now seen corresponding path program 7 times [2021-11-25 19:40:45,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372477741] [2021-11-25 19:40:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:45,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:58,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372477741] [2021-11-25 19:40:58,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372477741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347070085] [2021-11-25 19:40:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:40:58,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:58,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:58,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:40:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-25 19:40:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:13,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:51,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347070085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785814588] [2021-11-25 19:41:51,387 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:41:51,387 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:51,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:51,388 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:51,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:51,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:53,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5965#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0)) (and (<= ~SIZE~0 ~last~0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (not (= |ULTIMATE.start_main_~st~0#1| 1)) (or (and (not (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|)) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= ~SIZE~0 |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0))) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2021-11-25 19:41:53,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:53,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:41:53,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 576 [2021-11-25 19:41:53,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835818781] [2021-11-25 19:41:53,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:53,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 577 states [2021-11-25 19:41:53,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 577 interpolants. [2021-11-25 19:41:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148050, Invalid=188930, Unknown=0, NotChecked=0, Total=336980 [2021-11-25 19:41:53,119 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:31,772 INFO L93 Difference]: Finished difference Result 586 states and 780 transitions. [2021-11-25 19:42:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2021-11-25 19:42:31,773 INFO L78 Accepts]: Start accepts. Automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 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 195 [2021-11-25 19:42:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:31,776 INFO L225 Difference]: With dead ends: 586 [2021-11-25 19:42:31,776 INFO L226 Difference]: Without dead ends: 390 [2021-11-25 19:42:31,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223661 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=222158, Invalid=373054, Unknown=0, NotChecked=0, Total=595212 [2021-11-25 19:42:31,808 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:31,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:42:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-25 19:42:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2021-11-25 19:42:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-25 19:42:31,949 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-25 19:42:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:31,949 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-25 19:42:31,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-25 19:42:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-25 19:42:31,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:31,972 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-25 19:42:32,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:32,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:42:32,187 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -945949688, now seen corresponding path program 8 times [2021-11-25 19:42:32,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:32,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977239925] [2021-11-25 19:42:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:32,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:24,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977239925] [2021-11-25 19:43:24,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977239925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327250865] [2021-11-25 19:43:24,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:43:24,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:24,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:24,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:43:26,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-25 19:43:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 385 conjunts are in the unsatisfiable core [2021-11-25 19:43:26,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:21,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:58,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327250865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46671084] [2021-11-25 19:46:58,060 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:46:58,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:58,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:58,060 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:58,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:58,397 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:00,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11759#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (or (and (or (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|)) (and (or (and (or (<= ~SIZE~0 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1))) (= |ULTIMATE.start_main_~d~0#1| 0)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1))) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))))) (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:00,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:00,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:47:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 1152 [2021-11-25 19:47:00,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251251208] [2021-11-25 19:47:00,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:00,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1153 states [2021-11-25 19:47:00,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1153 interpolants. [2021-11-25 19:47:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590994, Invalid=746498, Unknown=0, NotChecked=0, Total=1337492 [2021-11-25 19:47:00,788 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:51,130 INFO L93 Difference]: Finished difference Result 1162 states and 1548 transitions. [2021-11-25 19:49:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2021-11-25 19:49:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 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 387 [2021-11-25 19:49:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:51,140 INFO L225 Difference]: With dead ends: 1162 [2021-11-25 19:49:51,140 INFO L226 Difference]: Without dead ends: 774 [2021-11-25 19:49:51,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1927 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 1538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889709 ImplicationChecksByTransitivity, 406.2s TimeCoverageRelationStatistics Valid=886670, Invalid=1483390, Unknown=0, NotChecked=0, Total=2370060 [2021-11-25 19:49:51,269 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 1932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1932 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:51,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1932 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:49:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-25 19:49:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 773. [2021-11-25 19:49:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0025906735751295) internal successors, (774), 772 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 774 transitions. [2021-11-25 19:49:51,311 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 774 transitions. Word has length 387 [2021-11-25 19:49:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:51,312 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 774 transitions. [2021-11-25 19:49:51,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 774 transitions. [2021-11-25 19:49:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-11-25 19:49:51,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:51,340 INFO L514 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1, 1] [2021-11-25 19:49:51,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_713c0a92-a8a8-4c8a-89d1-19876afe2a00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:51,565 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 45747208, now seen corresponding path program 9 times [2021-11-25 19:49:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589440212] [2021-11-25 19:49:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:51,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat