./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2.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_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/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_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/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_85cf50b2-527f-4374-aa94-e817ca149948/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 fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:48:23,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:48:23,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:48:23,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:48:23,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:48:23,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:48:23,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:48:23,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:48:23,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:48:23,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:48:23,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:48:23,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:48:23,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:48:23,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:48:23,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:48:23,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:48:23,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:48:23,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:48:23,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:48:23,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:48:23,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:48:24,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:48:24,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:48:24,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:48:24,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:48:24,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:48:24,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:48:24,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:48:24,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:48:24,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:48:24,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:48:24,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:48:24,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:48:24,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:48:24,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:48:24,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:48:24,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:48:24,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:48:24,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:48:24,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:48:24,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:48:24,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:48:24,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:48:24,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:48:24,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:48:24,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:48:24,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:48:24,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:48:24,059 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:48:24,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:48:24,060 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:48:24,060 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:48:24,060 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:48:24,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:48:24,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:48:24,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:48:24,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:48:24,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:48:24,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:48:24,062 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:48:24,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:48:24,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:48:24,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:48:24,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:48:24,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:48:24,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:48:24,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:48:24,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:48:24,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:48:24,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:48:24,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:48:24,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:48:24,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:48:24,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:48:24,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:24,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:48:24,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:48:24,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:48:24,068 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:48:24,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:48:24,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:48:24,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:48:24,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:48:24,069 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_85cf50b2-527f-4374-aa94-e817ca149948/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc354f47e1cc26b26f82415b2113a1e937a24cebf9ecb225fe7f6242be1c8136 [2021-11-25 19:48:24,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:48:24,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:48:24,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:48:24,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:48:24,395 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:48:24,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/brs2.c [2021-11-25 19:48:24,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/data/2daef411a/4e9318967a014134a34455421a87168b/FLAGe1e43fc1d [2021-11-25 19:48:25,060 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:48:25,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/sv-benchmarks/c/array-fpi/brs2.c [2021-11-25 19:48:25,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/data/2daef411a/4e9318967a014134a34455421a87168b/FLAGe1e43fc1d [2021-11-25 19:48:25,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/data/2daef411a/4e9318967a014134a34455421a87168b [2021-11-25 19:48:25,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:48:25,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:48:25,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:25,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:48:25,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:48:25,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657442dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25, skipping insertion in model container [2021-11-25 19:48:25,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:25,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:25,679 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_85cf50b2-527f-4374-aa94-e817ca149948/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-11-25 19:48:25,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:25,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:25,729 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_85cf50b2-527f-4374-aa94-e817ca149948/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-11-25 19:48:25,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:25,753 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:25,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25 WrapperNode [2021-11-25 19:48:25,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:25,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:25,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:25,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:25,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,797 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-11-25 19:48:25,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:25,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:25,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:25,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:25,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:25,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:25,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:25,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:25,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:25,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:25,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:48:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:48:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:48:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:48:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:48:25,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:48:25,998 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:25,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:26,163 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:26,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:26,244 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:48:26,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:26 BoogieIcfgContainer [2021-11-25 19:48:26,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:26,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:26,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:26,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:26,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:48:25" (1/3) ... [2021-11-25 19:48:26,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ea924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:26, skipping insertion in model container [2021-11-25 19:48:26,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (2/3) ... [2021-11-25 19:48:26,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ea924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:26, skipping insertion in model container [2021-11-25 19:48:26,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:26" (3/3) ... [2021-11-25 19:48:26,271 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2.c [2021-11-25 19:48:26,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:26,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:48:26,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:26,355 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 19:48:26,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:48:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) 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 19:48:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:48:26,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:26,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:48:26,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1448994786, now seen corresponding path program 1 times [2021-11-25 19:48:26,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:26,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678238980] [2021-11-25 19:48:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:26,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:26,719 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 19:48:26,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678238980] [2021-11-25 19:48:26,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678238980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:26,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:26,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:26,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665164267] [2021-11-25 19:48:26,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:26,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:26,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:26,783 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:26,852 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-25 19:48:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:48:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:26,865 INFO L225 Difference]: With dead ends: 18 [2021-11-25 19:48:26,869 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 19:48:26,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:26,884 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:26,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 19:48:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 19:48:26,914 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 19:48:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 19:48:26,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-25 19:48:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:26,916 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 19:48:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 19:48:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:48:26,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:26,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:48:26,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1973441861, now seen corresponding path program 1 times [2021-11-25 19:48:26,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921630399] [2021-11-25 19:48:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:26,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:48:27,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921630399] [2021-11-25 19:48:27,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921630399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:27,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673106265] [2021-11-25 19:48:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:27,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:27,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:27,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:27,023 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 19:48:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:27,045 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 19:48:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-25 19:48:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:27,047 INFO L225 Difference]: With dead ends: 12 [2021-11-25 19:48:27,047 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:48:27,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:27,049 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:27,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:48:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:48:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 19:48:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 19:48:27,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 19:48:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:27,055 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 19:48:27,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 19:48:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 19:48:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:48:27,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:27,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:48:27,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1046873979, now seen corresponding path program 1 times [2021-11-25 19:48:27,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:27,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166426997] [2021-11-25 19:48:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:48:27,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:27,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166426997] [2021-11-25 19:48:27,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166426997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:27,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681921421] [2021-11-25 19:48:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:27,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:48:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:48:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:27,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:27,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:48:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:48:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:27,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 19:48:27,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:27,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 19:48:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-11-25 19:48:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 19:48:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:48:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681921421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714108962] [2021-11-25 19:48:28,021 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:48:28,022 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:28,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:28,038 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:28,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,199 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 19:48:28,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 19:48:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,324 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 19:48:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 19:48:28,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 242 [2021-11-25 19:48:28,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-25 19:48:28,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,873 INFO L354 Elim1Store]: treesize reduction 255, result has 14.4 percent of original size [2021-11-25 19:48:28,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 511 treesize of output 578 [2021-11-25 19:48:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,106 INFO L354 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2021-11-25 19:48:29,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 553 treesize of output 450 [2021-11-25 19:48:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,488 INFO L354 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2021-11-25 19:48:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 553 treesize of output 467 [2021-11-25 19:48:29,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:29,895 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 19:48:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 149 [2021-11-25 19:48:29,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2021-11-25 19:48:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:30,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 109 [2021-11-25 19:48:30,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 19:48:30,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:30,270 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:30,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem10#1| (* 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:30,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:30,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:30,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 19:48:30,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456670760] [2021-11-25 19:48:30,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:30,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:48:30,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:48:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:48:30,571 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 19:48:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:30,640 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-25 19:48:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:48:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:48:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:30,645 INFO L225 Difference]: With dead ends: 13 [2021-11-25 19:48:30,645 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 19:48:30,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:48:30,648 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:30,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 19:48:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 19:48:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 19:48:30,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-25 19:48:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 19:48:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 19:48:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 19:48:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:48:30,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:30,654 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:30,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:30,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:30,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1906926587, now seen corresponding path program 2 times [2021-11-25 19:48:30,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:30,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932156247] [2021-11-25 19:48:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:30,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:31,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932156247] [2021-11-25 19:48:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932156247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399458251] [2021-11-25 19:48:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:48:31,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:31,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:31,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:48:31,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:48:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:48:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:31,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:31,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399458251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566022158] [2021-11-25 19:48:31,188 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:48:31,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:31,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:31,189 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:31,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,308 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 19:48:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 19:48:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,404 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 19:48:31,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 19:48:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 19:48:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:31,716 INFO L354 Elim1Store]: treesize reduction 260, result has 21.0 percent of original size [2021-11-25 19:48:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 17 case distinctions, treesize of input 485 treesize of output 559 [2021-11-25 19:48:31,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:31,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:32,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 95 [2021-11-25 19:48:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 417 treesize of output 316 [2021-11-25 19:48:32,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:32,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:32,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:32,568 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 19:48:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 152 [2021-11-25 19:48:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:32,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:48:32,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:32,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2021-11-25 19:48:32,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 52 [2021-11-25 19:48:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:33,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 19:48:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:33,038 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:33,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem10#1| (* 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:33,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:33,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:33,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-25 19:48:33,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638792303] [2021-11-25 19:48:33,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:48:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:48:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:48:33,281 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 19:48:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:33,326 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-11-25 19:48:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 19:48:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:33,328 INFO L225 Difference]: With dead ends: 17 [2021-11-25 19:48:33,328 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 19:48:33,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:48:33,329 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:33,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 19:48:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 19:48:33,332 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 19:48:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 19:48:33,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 19:48:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:33,333 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 19:48:33,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 19:48:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 19:48:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:48:33,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:33,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:33,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:33,538 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1099829186, now seen corresponding path program 3 times [2021-11-25 19:48:33,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998663456] [2021-11-25 19:48:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:33,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:33,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998663456] [2021-11-25 19:48:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998663456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:33,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152312826] [2021-11-25 19:48:33,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:48:33,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:33,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:48:33,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:48:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:33,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:48:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2021-11-25 19:48:34,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-25 19:48:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-25 19:48:34,298 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-11-25 19:48:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2021-11-25 19:48:34,491 INFO L354 Elim1Store]: treesize reduction 58, result has 55.7 percent of original size [2021-11-25 19:48:34,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 101 [2021-11-25 19:48:36,626 INFO L354 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2021-11-25 19:48:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 75 [2021-11-25 19:48:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 19:48:37,080 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (or (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (let ((.cse0 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or .cse0 (and (forall ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_126 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_126) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_126 |ULTIMATE.start_main_~#sum~0#1.offset|)) (* 2 c_~N~0))) (not (= .cse1 0)))) (or (not .cse0) (forall ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (<= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (* 2 c_~N~0)))))) (<= c_~N~0 .cse1))) is different from false [2021-11-25 19:48:38,983 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:48:38,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 1 [2021-11-25 19:48:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-25 19:48:38,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152312826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411009630] [2021-11-25 19:48:38,997 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:48:38,997 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:38,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:38,998 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:38,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,095 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 19:48:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 19:48:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,190 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 19:48:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 19:48:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 19:48:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:39,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:39,458 INFO L354 Elim1Store]: treesize reduction 260, result has 21.0 percent of original size [2021-11-25 19:48:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 17 case distinctions, treesize of input 485 treesize of output 559 [2021-11-25 19:48:39,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:39,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 85 [2021-11-25 19:48:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 92 [2021-11-25 19:48:40,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 85 [2021-11-25 19:48:40,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 429 treesize of output 332 [2021-11-25 19:48:40,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:40,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:40,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:40,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:40,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:40,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:40,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:41,016 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 19:48:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 152 [2021-11-25 19:48:41,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:41,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:41,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2021-11-25 19:48:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:41,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:41,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 112 [2021-11-25 19:48:41,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:41,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:41,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 19:48:41,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:41,352 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:41,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '355#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (= (ite (<= |ULTIMATE.start_main_#t~mem10#1| (* 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 19:48:41,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:41,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2021-11-25 19:48:41,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309920584] [2021-11-25 19:48:41,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:41,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:48:41,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:48:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=351, Unknown=1, NotChecked=38, Total=462 [2021-11-25 19:48:41,825 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:42,092 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 19:48:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:48:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:48:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:42,095 INFO L225 Difference]: With dead ends: 18 [2021-11-25 19:48:42,095 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:48:42,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=120, Invalid=585, Unknown=1, NotChecked=50, Total=756 [2021-11-25 19:48:42,097 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:42,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-25 19:48:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:48:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-11-25 19:48:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 19:48:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 19:48:42,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-25 19:48:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 19:48:42,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 19:48:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:48:42,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:42,114 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:42,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:42,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:42,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash 265315170, now seen corresponding path program 4 times [2021-11-25 19:48:42,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864121107] [2021-11-25 19:48:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:42,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:42,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864121107] [2021-11-25 19:48:42,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864121107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543464669] [2021-11-25 19:48:42,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:48:42,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:42,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:42,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:48:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:48:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:42,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:42,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543464669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033387537] [2021-11-25 19:48:42,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:48:42,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:42,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:42,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:42,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,638 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 19:48:42,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 19:48:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,724 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 19:48:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 19:48:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 242 [2021-11-25 19:48:42,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 61 [2021-11-25 19:48:42,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:42,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,037 INFO L354 Elim1Store]: treesize reduction 255, result has 14.4 percent of original size [2021-11-25 19:48:43,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 511 treesize of output 578 [2021-11-25 19:48:43,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-25 19:48:43,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:43,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 94 [2021-11-25 19:48:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:43,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:43,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:43,522 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 19:48:43,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 152 [2021-11-25 19:48:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:43,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:48:43,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:43,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2021-11-25 19:48:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2021-11-25 19:48:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-11-25 19:48:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:43,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 19:48:43,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:43,822 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:44,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '491#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem10#1| (* 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:44,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:44,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:44,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-25 19:48:44,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559787014] [2021-11-25 19:48:44,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:44,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:48:44,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:48:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:48:44,093 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:44,161 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-25 19:48:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:48:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 19:48:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:44,162 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:48:44,162 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:48:44,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:48:44,164 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:48:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:48:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 19:48:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 19:48:44,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-25 19:48:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:44,170 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 19:48:44,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 19:48:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:48:44,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:44,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:44,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:44,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:48:44,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:44,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:44,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1286007525, now seen corresponding path program 5 times [2021-11-25 19:48:44,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:44,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627586277] [2021-11-25 19:48:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:44,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:44,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627586277] [2021-11-25 19:48:44,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627586277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436210528] [2021-11-25 19:48:44,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:48:44,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:44,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:48:44,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:48:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:48:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:48:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 64 [2021-11-25 19:48:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-11-25 19:48:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-11-25 19:48:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-25 19:48:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 56 [2021-11-25 19:48:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2021-11-25 19:48:45,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-11-25 19:48:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 19:48:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-25 19:48:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-11-25 19:48:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-11-25 19:48:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 56 [2021-11-25 19:48:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:47,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:47,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 19:48:54,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:54,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 47 [2021-11-25 19:48:54,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-25 19:48:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-25 19:48:55,389 INFO L354 Elim1Store]: treesize reduction 40, result has 11.1 percent of original size [2021-11-25 19:48:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 571 treesize of output 526 [2021-11-25 19:48:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436210528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853902115] [2021-11-25 19:48:56,540 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:48:56,540 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:56,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:56,540 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:56,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,660 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 19:48:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 19:48:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:48:56,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 242 [2021-11-25 19:48:56,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:56,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 60 [2021-11-25 19:48:56,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,970 INFO L354 Elim1Store]: treesize reduction 255, result has 14.4 percent of original size [2021-11-25 19:48:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 511 treesize of output 578 [2021-11-25 19:48:57,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,068 INFO L354 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2021-11-25 19:48:57,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 553 treesize of output 483 [2021-11-25 19:48:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,373 INFO L354 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2021-11-25 19:48:57,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 553 treesize of output 434 [2021-11-25 19:48:57,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:57,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:57,640 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 19:48:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 149 [2021-11-25 19:48:57,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:57,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 15 [2021-11-25 19:48:57,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:48:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 54 [2021-11-25 19:48:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 19:48:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:57,892 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:58,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '645#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= (ite (<= |ULTIMATE.start_main_#t~mem10#1| (* 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:58,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:58,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:58,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2021-11-25 19:48:58,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763719094] [2021-11-25 19:48:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:48:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:48:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=800, Unknown=23, NotChecked=0, Total=930 [2021-11-25 19:48:58,393 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 19:48:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:59,088 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 19:48:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:48:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:48:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:59,090 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:48:59,090 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:48:59,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=169, Invalid=1135, Unknown=28, NotChecked=0, Total=1332 [2021-11-25 19:48:59,092 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:59,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-25 19:48:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:48:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-25 19:48:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 19:48:59,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-25 19:48:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:59,098 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 19:48:59,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 19:48:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 19:48:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:48:59,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:59,099 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:59,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:59,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:59,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1211809179, now seen corresponding path program 6 times [2021-11-25 19:48:59,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:59,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595093214] [2021-11-25 19:48:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:59,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:59,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595093214] [2021-11-25 19:48:59,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595093214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876856795] [2021-11-25 19:48:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:48:59,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:59,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:59,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cf50b2-527f-4374-aa94-e817ca149948/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:48:59,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:48:59,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:59,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 19:48:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:59,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:48:59,617 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-25 19:48:59,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 93 [2021-11-25 19:48:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-25 19:48:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 36 [2021-11-25 19:48:59,821 INFO L354 Elim1Store]: treesize reduction 174, result has 22.0 percent of original size [2021-11-25 19:48:59,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 121 [2021-11-25 19:48:59,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:48:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 31 [2021-11-25 19:48:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 31 [2021-11-25 19:49:00,632 INFO L354 Elim1Store]: treesize reduction 330, result has 49.8 percent of original size [2021-11-25 19:49:00,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 134 treesize of output 394 [2021-11-25 19:49:09,594 INFO L354 Elim1Store]: treesize reduction 646, result has 33.3 percent of original size [2021-11-25 19:49:09,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 204 treesize of output 441 [2021-11-25 19:49:25,023 WARN L227 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 954 DAG size of output: 217 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:49:25,025 INFO L354 Elim1Store]: treesize reduction 5026, result has 14.9 percent of original size [2021-11-25 19:49:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 209 case distinctions, treesize of input 751 treesize of output 1316