./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ms3.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_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/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_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ms3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/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_018ffb43-b428-4e03-a562-da07fefef066/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 b493eaf5cbb9a8ad0f724257518d8f922b0657033a5eb7aa4f50992fe6ac33a4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:22:29,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:22:29,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:22:29,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:22:29,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:22:29,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:22:29,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:22:29,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:22:29,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:22:29,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:22:29,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:22:29,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:22:29,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:22:29,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:22:29,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:22:29,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:22:29,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:22:29,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:22:29,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:22:29,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:22:29,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:22:29,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:22:29,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:22:29,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:22:29,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:22:29,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:22:29,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:22:29,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:22:29,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:22:29,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:22:29,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:22:29,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:22:29,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:22:29,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:22:29,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:22:29,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:22:29,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:22:29,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:22:29,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:22:29,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:22:29,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:22:29,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:22:29,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:22:29,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:22:29,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:22:29,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:22:29,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:22:29,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:22:29,980 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:22:29,980 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:22:29,980 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:22:29,980 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:22:29,981 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:22:29,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:22:29,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:22:29,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:22:29,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:22:29,983 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:22:29,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:22:29,983 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:22:29,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:22:29,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:22:29,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:22:29,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:22:29,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:22:29,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:22:29,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:22:29,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:22:29,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:22:29,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:22:29,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:22:29,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:22:29,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:22:29,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:22:29,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:29,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:22:29,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:22:29,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:22:29,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:22:29,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:22:29,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:22:29,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:22:29,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:22:29,990 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_018ffb43-b428-4e03-a562-da07fefef066/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b493eaf5cbb9a8ad0f724257518d8f922b0657033a5eb7aa4f50992fe6ac33a4 [2021-11-25 20:22:30,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:22:30,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:22:30,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:22:30,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:22:30,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:22:30,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/ms3.c [2021-11-25 20:22:30,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/data/fad1b39e1/383c44a73cd44d06ace7400a4f5b0dcd/FLAG0150cf44e [2021-11-25 20:22:30,770 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:22:30,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/sv-benchmarks/c/array-fpi/ms3.c [2021-11-25 20:22:30,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/data/fad1b39e1/383c44a73cd44d06ace7400a4f5b0dcd/FLAG0150cf44e [2021-11-25 20:22:31,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/data/fad1b39e1/383c44a73cd44d06ace7400a4f5b0dcd [2021-11-25 20:22:31,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:22:31,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:22:31,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:31,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:22:31,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:22:31,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f54985a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31, skipping insertion in model container [2021-11-25 20:22:31,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:22:31,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:22:31,392 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_018ffb43-b428-4e03-a562-da07fefef066/sv-benchmarks/c/array-fpi/ms3.c[586,599] [2021-11-25 20:22:31,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:31,432 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:22:31,448 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_018ffb43-b428-4e03-a562-da07fefef066/sv-benchmarks/c/array-fpi/ms3.c[586,599] [2021-11-25 20:22:31,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:31,487 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:22:31,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31 WrapperNode [2021-11-25 20:22:31,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:31,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:31,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:22:31,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:22:31,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,545 INFO L137 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-11-25 20:22:31,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:31,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:22:31,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:22:31,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:22:31,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:22:31,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:22:31,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:22:31,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:22:31,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (1/1) ... [2021-11-25 20:22:31,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:31,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:22:31,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:22:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:22:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:22:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:22:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:22:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:22:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:22:31,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:22:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:22:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:22:31,749 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:22:31,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:22:31,896 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:22:31,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:22:31,929 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:22:31,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:31 BoogieIcfgContainer [2021-11-25 20:22:31,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:22:31,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:22:31,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:22:31,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:22:31,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:22:31" (1/3) ... [2021-11-25 20:22:31,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c686ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:31, skipping insertion in model container [2021-11-25 20:22:31,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:31" (2/3) ... [2021-11-25 20:22:31,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c686ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:31, skipping insertion in model container [2021-11-25 20:22:31,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:31" (3/3) ... [2021-11-25 20:22:31,947 INFO L111 eAbstractionObserver]: Analyzing ICFG ms3.c [2021-11-25 20:22:31,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:22:31,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:22:31,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:22:32,002 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 20:22:32,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:22:32,015 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 20:22:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:22:32,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:32,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:22:32,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1569259291, now seen corresponding path program 1 times [2021-11-25 20:22:32,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:32,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494613946] [2021-11-25 20:22:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:32,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:32,275 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 20:22:32,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:32,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494613946] [2021-11-25 20:22:32,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494613946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:32,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:32,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:32,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721416453] [2021-11-25 20:22:32,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:32,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:32,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:32,312 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 20:22:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:32,349 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-25 20:22:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:32,352 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 20:22:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:32,359 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:22:32,359 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 20:22:32,362 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 20:22:32,366 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 20:22:32,367 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 20:22:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 20:22:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 20:22:32,401 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 20:22:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 20:22:32,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-25 20:22:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:32,403 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 20:22:32,403 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 20:22:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 20:22:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:22:32,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:32,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:22:32,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1413400264, now seen corresponding path program 1 times [2021-11-25 20:22:32,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:32,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280200176] [2021-11-25 20:22:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:32,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:32,564 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 20:22:32,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280200176] [2021-11-25 20:22:32,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280200176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:32,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:32,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:22:32,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946232099] [2021-11-25 20:22:32,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:32,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:22:32,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:22:32,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:22:32,574 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 20:22:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:32,614 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 20:22:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:22:32,617 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 20:22:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:32,617 INFO L225 Difference]: With dead ends: 12 [2021-11-25 20:22:32,617 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 20:22:32,618 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 20:22:32,620 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 20:22:32,621 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 20:22:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 20:22:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 20:22:32,629 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 20:22:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 20:22:32,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 20:22:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:32,630 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 20:22:32,631 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 20:22:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 20:22:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:22:32,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:32,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:32,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:22:32,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash -865774635, now seen corresponding path program 1 times [2021-11-25 20:22:32,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:32,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925354785] [2021-11-25 20:22:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:32,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:32,796 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 20:22:32,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925354785] [2021-11-25 20:22:32,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925354785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022759253] [2021-11-25 20:22:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:32,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:32,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:22:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:22:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:33,022 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 20:22:33,110 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 20:22:33,159 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 20:22:33,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:33,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:33,280 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 20:22:33,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:33,296 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 20:22:33,340 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 7 treesize of output 3 [2021-11-25 20:22:33,352 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 20:22:33,401 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 20:22:33,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022759253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:33,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380091662] [2021-11-25 20:22:33,432 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:22:33,433 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:33,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:33,443 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:33,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:33,600 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:22:33,600 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 20:22:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:33,740 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:22:33,740 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 20:22:33,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-25 20:22:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:34,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:34,253 INFO L354 Elim1Store]: treesize reduction 234, result has 13.0 percent of original size [2021-11-25 20:22:34,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 421 treesize of output 418 [2021-11-25 20:22:34,497 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 40 treesize of output 36 [2021-11-25 20:22:34,563 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 20:22:34,616 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 20:22:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:34,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:34,628 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 20:22:34,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:34,976 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 20:22:34,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:22:34,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:34,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 20:22:34,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941721367] [2021-11-25 20:22:34,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:34,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:22:34,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:22:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:22:34,979 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 20:22:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:35,036 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-25 20:22:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:22:35,037 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 20:22:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:35,037 INFO L225 Difference]: With dead ends: 13 [2021-11-25 20:22:35,037 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 20:22:35,038 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 20:22:35,040 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:35,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 20:22:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 20:22:35,043 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 20:22:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 20:22:35,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-25 20:22:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:35,044 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 20:22:35,044 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 20:22:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 20:22:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:22:35,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:35,045 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:35,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:35,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 20:22:35,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1069249320, now seen corresponding path program 2 times [2021-11-25 20:22:35,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:35,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838697603] [2021-11-25 20:22:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:35,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:35,362 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 20:22:35,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:35,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838697603] [2021-11-25 20:22:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838697603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786357202] [2021-11-25 20:22:35,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:22:35,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:35,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:35,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:22:35,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:22:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:22:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:22:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:35,489 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 20:22:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:35,516 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 20:22:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786357202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23511751] [2021-11-25 20:22:35,526 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:22:35,526 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:35,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:35,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:35,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,632 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:22:35,633 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 20:22:35,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,730 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:22:35,731 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 20:22:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-25 20:22:35,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:36,007 INFO L354 Elim1Store]: treesize reduction 234, result has 13.0 percent of original size [2021-11-25 20:22:36,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 421 treesize of output 418 [2021-11-25 20:22:36,135 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 40 treesize of output 36 [2021-11-25 20:22:36,197 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 20:22:36,228 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 20:22:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:36,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:36,239 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 20:22:36,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:36,547 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 20:22:36,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:22:36,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:36,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-25 20:22:36,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799189765] [2021-11-25 20:22:36,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:36,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:22:36,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:36,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:22:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:22:36,549 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 20:22:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:36,589 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-11-25 20:22:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:22:36,590 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 20:22:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:36,590 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:22:36,590 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 20:22:36,591 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 20:22:36,592 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 20:22:36,592 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 20:22:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 20:22:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 20:22:36,595 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 20:22:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 20:22:36,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 20:22:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:36,596 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 20:22:36,596 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 20:22:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 20:22:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:22:36,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:36,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:36,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:36,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:36,806 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -732622939, now seen corresponding path program 3 times [2021-11-25 20:22:36,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875717975] [2021-11-25 20:22:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:37,133 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 20:22:37,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:37,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875717975] [2021-11-25 20:22:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875717975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844368916] [2021-11-25 20:22:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:22:37,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:37,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:37,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:37,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:22:37,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:22:37,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:22:37,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:22:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:37,226 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 15 treesize of output 11 [2021-11-25 20:22:38,282 INFO L354 Elim1Store]: treesize reduction 73, result has 54.7 percent of original size [2021-11-25 20:22:38,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 199 [2021-11-25 20:22:53,955 WARN L227 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 97 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:54,165 INFO L354 Elim1Store]: treesize reduction 148, result has 48.4 percent of original size [2021-11-25 20:22:54,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 315 [2021-11-25 20:22:57,978 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-11-25 20:22:57,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 76 [2021-11-25 20:22:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:22:58,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:58,282 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 20:23:00,149 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 100 treesize of output 94 [2021-11-25 20:23:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:23:00,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844368916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711340481] [2021-11-25 20:23:00,201 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:23:00,205 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:00,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:00,206 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:00,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,311 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:23:00,312 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 20:23:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,335 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 20:23:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-25 20:23:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:00,532 INFO L354 Elim1Store]: treesize reduction 234, result has 13.0 percent of original size [2021-11-25 20:23:00,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 421 treesize of output 418 [2021-11-25 20:23:00,646 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 40 treesize of output 36 [2021-11-25 20:23:00,691 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 20:23:00,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:00,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:00,720 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 20:23:00,725 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 20:23:00,740 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:01,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '355#(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 20:23:01,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:01,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:01,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-11-25 20:23:01,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810666053] [2021-11-25 20:23:01,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:01,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 20:23:01,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 20:23:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:23:01,035 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 20:23:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:03,394 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 20:23:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:23:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 20:23:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:03,395 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:23:03,395 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:23:03,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=113, Invalid=588, Unknown=1, NotChecked=0, Total=702 [2021-11-25 20:23:03,397 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:03,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-11-25 20:23:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:23:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-11-25 20:23:03,402 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 20:23:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 20:23:03,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-25 20:23:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:03,403 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 20:23:03,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 20:23:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 20:23:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:23:03,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:03,404 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:03,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:03,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:03,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1236514040, now seen corresponding path program 4 times [2021-11-25 20:23:03,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:03,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365682026] [2021-11-25 20:23:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,689 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 20:23:03,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365682026] [2021-11-25 20:23:03,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365682026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217346390] [2021-11-25 20:23:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:23:03,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:03,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:03,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:23:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:23:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:03,821 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 20:23:03,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:03,853 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 20:23:03,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217346390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:03,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830532246] [2021-11-25 20:23:03,856 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:23:03,856 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:03,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:03,856 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:03,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:03,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:03,942 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:23:03,942 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 20:23:03,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,031 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:23:04,031 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 20:23:04,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 117 [2021-11-25 20:23:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,218 INFO L354 Elim1Store]: treesize reduction 225, result has 8.9 percent of original size [2021-11-25 20:23:04,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 450 treesize of output 441 [2021-11-25 20:23:04,292 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 40 treesize of output 36 [2021-11-25 20:23:04,322 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 20:23:04,391 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 20:23:04,391 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 20:23:04,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:04,495 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 20:23:04,516 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 20:23:04,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:04,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,547 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 61 treesize of output 40 [2021-11-25 20:23:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:04,638 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 20:23:04,643 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 20:23:04,656 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:04,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '489#(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 20:23:04,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:04,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:04,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-25 20:23:04,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899521108] [2021-11-25 20:23:04,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:04,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:23:04,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:23:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:23:04,899 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 20:23:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:04,975 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-25 20:23:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:23:04,976 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 20:23:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:04,976 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:23:04,976 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 20:23:04,977 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 20:23:04,978 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:04,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 20:23:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 20:23:04,981 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 20:23:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 20:23:04,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-25 20:23:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:04,982 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 20:23:04,982 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 20:23:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 20:23:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:23:04,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:04,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:05,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:05,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:05,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash 138890901, now seen corresponding path program 5 times [2021-11-25 20:23:05,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:05,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303678787] [2021-11-25 20:23:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:05,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:05,586 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 20:23:05,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303678787] [2021-11-25 20:23:05,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303678787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206950386] [2021-11-25 20:23:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:23:05,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:05,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:05,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:23:05,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:23:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:23:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:23:05,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:05,738 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 20:23:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-25 20:23:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,200 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 35 treesize of output 37 [2021-11-25 20:23:06,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,381 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 57 treesize of output 45 [2021-11-25 20:23:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 80 [2021-11-25 20:23:06,538 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 20:23:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,596 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 20:23:06,601 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 20:23:06,689 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 47 treesize of output 37 [2021-11-25 20:23:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:09,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:09,627 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 73 treesize of output 27 [2021-11-25 20:23:09,705 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 20:23:09,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:09,862 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 20:23:13,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_202 Int) (|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< 0 v_ArrVal_202) (< (+ |v_ULTIMATE.start_main_~i~0#1_105| 1) c_~N~0) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_105|) (let ((.cse0 (= (+ |c_ULTIMATE.start_main_~i~0#1| 1) 0))) (and (or .cse0 (let ((.cse1 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or (not .cse1) (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_207 Int)) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (< (+ v_ArrVal_202 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_202)) |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))) v_ArrVal_207) (<= (+ v_ArrVal_207 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_207)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_105| 4)))) (* 2 c_~N~0)))))) (or .cse1 (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_207 Int) (v_ArrVal_203 (Array Int Int))) (or (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_203) |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_203 |ULTIMATE.start_main_~#sum~0#1.offset|)) v_ArrVal_207) (<= (+ v_ArrVal_207 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_203 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_207)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_105| 4)))) (* 2 c_~N~0)))))))) (or (not .cse0) (forall ((v_ArrVal_206 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_206) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_105| 4))) (select v_ArrVal_206 |ULTIMATE.start_main_~#sum~0#1.offset|)) (* 2 c_~N~0)))) (not (= |v_ULTIMATE.start_main_~i~0#1_105| 0)))))) is different from false [2021-11-25 20:23:16,017 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 20:23:16,018 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 2820 treesize of output 2740 [2021-11-25 20:23:16,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:23:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940626181] [2021-11-25 20:23:16,035 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:23:16,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:16,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:16,036 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:16,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:16,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,126 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:23:16,127 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 20:23:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,151 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 20:23:16,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 117 [2021-11-25 20:23:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,336 INFO L354 Elim1Store]: treesize reduction 225, result has 8.9 percent of original size [2021-11-25 20:23:16,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 11 case distinctions, treesize of input 450 treesize of output 441 [2021-11-25 20:23:16,417 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 40 treesize of output 36 [2021-11-25 20:23:16,432 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 20:23:16,503 INFO L354 Elim1Store]: treesize reduction 51, result has 58.2 percent of original size [2021-11-25 20:23:16,504 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 20:23:16,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:16,608 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 20:23:16,639 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 85 treesize of output 68 [2021-11-25 20:23:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,654 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 121 treesize of output 104 [2021-11-25 20:23:16,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:16,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:16,742 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 20:23:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:16,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:16,762 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 20:23:16,775 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:17,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '635#(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 20:23:17,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:17,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:23:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-25 20:23:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583678278] [2021-11-25 20:23:17,055 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:17,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:23:17,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:23:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=4, NotChecked=54, Total=870 [2021-11-25 20:23:17,057 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 20:23:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:17,317 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-25 20:23:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:23:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 20:23:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:17,318 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:23:17,318 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:23:17,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=4, NotChecked=64, Total=1190 [2021-11-25 20:23:17,319 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:17,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:23:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-11-25 20:23:17,325 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 20:23:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:23:17,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-25 20:23:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:17,326 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:23:17,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 20:23:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:23:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:23:17,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:17,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:17,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:17,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:17,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash 10611224, now seen corresponding path program 6 times [2021-11-25 20:23:17,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:17,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553254483] [2021-11-25 20:23:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:17,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:17,617 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 20:23:17,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553254483] [2021-11-25 20:23:17,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553254483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549446917] [2021-11-25 20:23:17,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:23:17,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:17,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:17,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_018ffb43-b428-4e03-a562-da07fefef066/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:23:17,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:23:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:23:17,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 20:23:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:17,708 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 20:23:17,780 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-25 20:23:17,780 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 76 treesize of output 66 [2021-11-25 20:23:17,906 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-25 20:23:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 106 [2021-11-25 20:23:40,292 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 625 DAG size of output: 446 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:23:40,295 INFO L354 Elim1Store]: treesize reduction 1997, result has 59.4 percent of original size [2021-11-25 20:23:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 850 treesize of output 3511