./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V --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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:54:12,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:54:12,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:54:12,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:54:12,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:54:12,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:54:12,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:54:12,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:54:12,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:54:12,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:54:12,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:54:12,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:54:12,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:54:12,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:54:12,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:54:12,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:54:12,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:54:12,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:54:12,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:54:12,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:54:12,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:54:12,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:54:12,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:54:12,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:54:12,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:54:12,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:54:12,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:54:12,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:54:12,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:54:12,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:54:12,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:54:12,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:54:12,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:54:12,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:54:12,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:54:12,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:54:12,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:54:12,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:54:12,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:54:12,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:54:12,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:54:12,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:54:12,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:54:12,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:54:12,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:54:12,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:54:12,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:54:12,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:54:12,936 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:54:12,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:54:12,936 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:54:12,936 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:54:12,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:54:12,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:54:12,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:54:12,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:54:12,940 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:54:12,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:54:12,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:54:12,940 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:54:12,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:54:12,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:54:12,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:54:12,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:54:12,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:54:12,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:54:12,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:54:12,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:54:12,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:54:12,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:54:12,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:54:12,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:54:12,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:54:12,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:54:12,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:54:12,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:54:12,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:54:12,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:54:12,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:54:12,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:54:12,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:54:12,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:54:12,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:54:12,951 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_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2021-11-23 01:54:13,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:54:13,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:54:13,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:54:13,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:54:13,367 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:54:13,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/reducercommutativity/avg10-2.i [2021-11-23 01:54:13,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/data/8bbfb4124/b38f1b7fc91349ed91f800ceacafc2e9/FLAG02c9eba9c [2021-11-23 01:54:14,142 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:54:14,143 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/sv-benchmarks/c/reducercommutativity/avg10-2.i [2021-11-23 01:54:14,158 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/data/8bbfb4124/b38f1b7fc91349ed91f800ceacafc2e9/FLAG02c9eba9c [2021-11-23 01:54:14,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/data/8bbfb4124/b38f1b7fc91349ed91f800ceacafc2e9 [2021-11-23 01:54:14,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:54:14,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:54:14,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:54:14,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:54:14,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:54:14,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a73cc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14, skipping insertion in model container [2021-11-23 01:54:14,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:54:14,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:54:14,762 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_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2021-11-23 01:54:14,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:54:14,776 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:54:14,802 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_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2021-11-23 01:54:14,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:54:14,821 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:54:14,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14 WrapperNode [2021-11-23 01:54:14,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:54:14,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:54:14,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:54:14,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:54:14,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,868 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-11-23 01:54:14,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:54:14,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:54:14,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:54:14,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:54:14,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:54:14,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:54:14,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:54:14,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:54:14,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:54:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:14,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:54:14,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:54:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:54:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:54:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:54:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:54:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2021-11-23 01:54:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2021-11-23 01:54:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:54:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:54:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:54:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:54:15,122 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:54:15,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:54:15,318 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:54:15,358 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:54:15,358 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:54:15,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:15 BoogieIcfgContainer [2021-11-23 01:54:15,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:54:15,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:54:15,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:54:15,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:54:15,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:54:14" (1/3) ... [2021-11-23 01:54:15,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d8f4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:15, skipping insertion in model container [2021-11-23 01:54:15,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14" (2/3) ... [2021-11-23 01:54:15,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d8f4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:15, skipping insertion in model container [2021-11-23 01:54:15,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:15" (3/3) ... [2021-11-23 01:54:15,372 INFO L111 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2021-11-23 01:54:15,378 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:54:15,379 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:54:15,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:54:15,446 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 [2021-11-23 01:54:15,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:54:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:54:15,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:15,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:15,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1847977284, now seen corresponding path program 1 times [2021-11-23 01:54:15,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:15,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195913528] [2021-11-23 01:54:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:15,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:54:15,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195913528] [2021-11-23 01:54:15,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195913528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:15,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:15,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:54:15,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445086349] [2021-11-23 01:54:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:15,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:54:15,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:54:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:54:15,925 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:16,004 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 01:54:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:54:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-23 01:54:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:16,018 INFO L225 Difference]: With dead ends: 33 [2021-11-23 01:54:16,018 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 01:54:16,022 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 [2021-11-23 01:54:16,030 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:16,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 01:54:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 01:54:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-23 01:54:16,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-23 01:54:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:16,095 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-23 01:54:16,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-23 01:54:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:54:16,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:16,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:16,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:54:16,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1923649121, now seen corresponding path program 1 times [2021-11-23 01:54:16,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791453121] [2021-11-23 01:54:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:54:16,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791453121] [2021-11-23 01:54:16,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791453121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623570333] [2021-11-23 01:54:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:16,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:16,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:54:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:54:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 01:54:16,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:54:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623570333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:16,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:54:16,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 01:54:16,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495250498] [2021-11-23 01:54:16,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:54:16,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:54:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:16,530 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:54:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:16,569 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-23 01:54:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:54:16,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 01:54:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:16,573 INFO L225 Difference]: With dead ends: 29 [2021-11-23 01:54:16,581 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 01:54:16,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:16,585 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 [2021-11-23 01:54:16,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 01:54:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 01:54:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 01:54:16,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-23 01:54:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:16,603 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 01:54:16,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:54:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 01:54:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:54:16,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:16,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:16,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:16,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:16,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -55252021, now seen corresponding path program 1 times [2021-11-23 01:54:16,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175258684] [2021-11-23 01:54:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:54:16,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175258684] [2021-11-23 01:54:16,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175258684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:16,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2997032] [2021-11-23 01:54:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:16,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:16,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:54:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:54:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 01:54:17,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:54:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2997032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:17,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:54:17,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 01:54:17,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467705832] [2021-11-23 01:54:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:17,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:54:17,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:54:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:17,133 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:54:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:17,157 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-23 01:54:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:54:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-23 01:54:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:17,159 INFO L225 Difference]: With dead ends: 27 [2021-11-23 01:54:17,160 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 01:54:17,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:17,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 [2021-11-23 01:54:17,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 01:54:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 01:54:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 01:54:17,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-23 01:54:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:17,172 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 01:54:17,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:54:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 01:54:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:54:17,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:17,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 01:54:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:17,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1228256621, now seen corresponding path program 1 times [2021-11-23 01:54:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:17,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584652709] [2021-11-23 01:54:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:54:17,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584652709] [2021-11-23 01:54:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584652709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160175853] [2021-11-23 01:54:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:17,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:17,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:54:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:54:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:54:17,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:54:17,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160175853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432340583] [2021-11-23 01:54:17,822 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:17,822 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:17,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:17,837 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:17,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,015 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:54:18,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:54:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,085 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:18,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:54:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:18,355 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:54:18,356 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 4 case distinctions, treesize of input 198 treesize of output 197 [2021-11-23 01:54:18,531 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 25 treesize of output 21 [2021-11-23 01:54:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,717 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:18,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:18,981 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 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:54:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:19,086 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 01:54:19,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 01:54:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:19,191 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 24 treesize of output 24 [2021-11-23 01:54:19,220 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 [2021-11-23 01:54:19,456 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:54:19,497 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:55:04,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:55:04,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:55:04,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:55:04,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-23 01:55:04,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406431609] [2021-11-23 01:55:04,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:55:04,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:55:04,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:55:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2021-11-23 01:55:04,970 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:55:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:05,010 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-23 01:55:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:55:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-23 01:55:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:05,012 INFO L225 Difference]: With dead ends: 36 [2021-11-23 01:55:05,012 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 01:55:05,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2021-11-23 01:55:05,014 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:05,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:55:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 01:55:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 01:55:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:55:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 01:55:05,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-23 01:55:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:05,031 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 01:55:05,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:55:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 01:55:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:55:05,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:05,035 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:05,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:55:05,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:05,257 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2048081288, now seen corresponding path program 2 times [2021-11-23 01:55:05,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:05,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348203841] [2021-11-23 01:55:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:05,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:55:05,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348203841] [2021-11-23 01:55:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348203841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:55:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997972134] [2021-11-23 01:55:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:55:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:05,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:05,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:55:05,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 01:55:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:55:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:55:05,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:55:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:55:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:55:05,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997972134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:55:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467282269] [2021-11-23 01:55:05,612 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:55:05,613 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:55:05,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:55:05,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:55:05,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:55:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,653 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:55:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:55:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:55:05,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:55:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,782 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:55:05,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 196 [2021-11-23 01:55:05,838 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 25 treesize of output 21 [2021-11-23 01:55:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:05,950 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:55:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:55:06,113 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:55:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,172 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:55:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:55:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:06,217 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 24 treesize of output 24 [2021-11-23 01:55:06,236 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 [2021-11-23 01:55:06,476 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:55:06,520 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:55:51,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:55:51,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:55:51,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:55:51,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 01:55:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649346040] [2021-11-23 01:55:51,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:55:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:55:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:55:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2021-11-23 01:55:51,770 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 01:55:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:51,817 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-23 01:55:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:55:51,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-23 01:55:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:51,819 INFO L225 Difference]: With dead ends: 38 [2021-11-23 01:55:51,819 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 01:55:51,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2021-11-23 01:55:51,821 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:51,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:55:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 01:55:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 01:55:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:55:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 01:55:51,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-23 01:55:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:51,829 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 01:55:51,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 01:55:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 01:55:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 01:55:51,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:51,832 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:51,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 01:55:52,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:52,057 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash -174007092, now seen corresponding path program 3 times [2021-11-23 01:55:52,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:52,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168956815] [2021-11-23 01:55:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:52,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 01:55:52,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168956815] [2021-11-23 01:55:52,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168956815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:55:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353138018] [2021-11-23 01:55:52,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:55:52,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:52,140 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:52,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:55:52,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:55:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:55:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:55:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 01:55:52,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:55:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 01:55:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353138018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:55:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784793034] [2021-11-23 01:55:52,572 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:55:52,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:55:52,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:55:52,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:55:52,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:55:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,659 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:55:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:55:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:55:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:55:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,790 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:55:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 196 [2021-11-23 01:55:52,854 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 25 treesize of output 21 [2021-11-23 01:55:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:52,955 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:55:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:55:53,100 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:55:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,164 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:55:53,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:55:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:53,197 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 24 treesize of output 24 [2021-11-23 01:55:53,216 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 [2021-11-23 01:55:53,440 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:55:53,495 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:56:36,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:56:36,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:56:36,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:56:36,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-23 01:56:36,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558453940] [2021-11-23 01:56:36,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:56:36,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 01:56:36,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 01:56:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=559, Unknown=12, NotChecked=0, Total=702 [2021-11-23 01:56:36,950 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:56:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:37,024 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2021-11-23 01:56:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:56:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2021-11-23 01:56:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:37,026 INFO L225 Difference]: With dead ends: 48 [2021-11-23 01:56:37,026 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 01:56:37,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=131, Invalid=559, Unknown=12, NotChecked=0, Total=702 [2021-11-23 01:56:37,028 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:37,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:56:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 01:56:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 01:56:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:56:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 01:56:37,036 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2021-11-23 01:56:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:37,037 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 01:56:37,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:56:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 01:56:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 01:56:37,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:37,040 INFO L514 BasicCegarLoop]: trace histogram [30, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:37,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:56:37,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 01:56:37,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 333155708, now seen corresponding path program 4 times [2021-11-23 01:56:37,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:37,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813182000] [2021-11-23 01:56:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:37,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 01:56:37,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813182000] [2021-11-23 01:56:37,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813182000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:56:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198621554] [2021-11-23 01:56:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:56:37,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:56:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:56:37,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:56:37,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:56:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:56:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:56:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 01:56:37,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:56:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 01:56:37,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198621554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:56:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963876325] [2021-11-23 01:56:37,853 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:56:37,854 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:56:37,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:56:37,854 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:56:37,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:56:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:37,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:56:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:56:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:37,943 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:56:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:56:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:56:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,043 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:56:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 196 [2021-11-23 01:56:38,085 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 25 treesize of output 21 [2021-11-23 01:56:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,161 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:56:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:56:38,297 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:56:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,349 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:56:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:56:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:56:38,383 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 24 treesize of output 24 [2021-11-23 01:56:38,401 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 [2021-11-23 01:56:38,583 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:56:38,621 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:23,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1632#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_avg_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 01:57:23,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:23,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:23,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2021-11-23 01:57:23,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743582727] [2021-11-23 01:57:23,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:23,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:57:23,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:57:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2021-11-23 01:57:23,813 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:57:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:23,875 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-11-23 01:57:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:57:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2021-11-23 01:57:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:23,877 INFO L225 Difference]: With dead ends: 62 [2021-11-23 01:57:23,877 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 01:57:23,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2021-11-23 01:57:23,879 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:23,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 01:57:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 01:57:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-23 01:57:23,888 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 56 [2021-11-23 01:57:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:23,889 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-23 01:57:23,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:57:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-23 01:57:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 01:57:23,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:23,893 INFO L514 BasicCegarLoop]: trace histogram [30, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:24,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:24,113 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1095007396, now seen corresponding path program 5 times [2021-11-23 01:57:24,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:24,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082619855] [2021-11-23 01:57:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:24,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-23 01:57:24,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082619855] [2021-11-23 01:57:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082619855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876307750] [2021-11-23 01:57:24,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:57:24,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:24,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:24,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:24,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:57:24,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:57:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:57:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 01:57:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 01:57:24,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-23 01:57:24,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876307750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723745753] [2021-11-23 01:57:24,636 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:57:24,636 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:24,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:24,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:24,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:24,691 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:57:24,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:57:24,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:24,719 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:24,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:57:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:24,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:57:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:24,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:24,830 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:57:24,830 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 4 case distinctions, treesize of input 198 treesize of output 197 [2021-11-23 01:57:24,907 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 25 treesize of output 21 [2021-11-23 01:57:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:24,985 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:57:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,124 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 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:57:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,195 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-23 01:57:25,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-23 01:57:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,264 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 24 treesize of output 24 [2021-11-23 01:57:25,290 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 [2021-11-23 01:57:25,492 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:57:25,534 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:10,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 01:58:10,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:58:10,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:58:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 01:58:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014978385] [2021-11-23 01:58:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:58:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:58:10,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:58:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2021-11-23 01:58:10,553 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:58:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:10,583 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-23 01:58:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:58:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-23 01:58:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:10,585 INFO L225 Difference]: With dead ends: 59 [2021-11-23 01:58:10,585 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 01:58:10,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2021-11-23 01:58:10,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:10,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:58:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 01:58:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 01:58:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:58:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-23 01:58:10,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 62 [2021-11-23 01:58:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-23 01:58:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:58:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-23 01:58:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 01:58:10,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:10,595 INFO L514 BasicCegarLoop]: trace histogram [30, 10, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:10,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:10,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:10,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash 967886684, now seen corresponding path program 6 times [2021-11-23 01:58:10,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:10,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113743872] [2021-11-23 01:58:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:10,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-23 01:58:10,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113743872] [2021-11-23 01:58:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113743872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805829819] [2021-11-23 01:58:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:58:10,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:10,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:10,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:58:11,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:58:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:58:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 01:58:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 01:58:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:58:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-23 01:58:11,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805829819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:58:11,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093953346] [2021-11-23 01:58:11,377 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:58:11,377 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:58:11,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:58:11,378 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:58:11,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:58:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,411 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:11,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:58:11,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:58:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:58:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:11,495 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:58:11,496 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 4 case distinctions, treesize of input 198 treesize of output 197 [2021-11-23 01:58:11,580 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 25 treesize of output 21 [2021-11-23 01:58:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,634 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:58:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:11,758 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:58:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,797 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:58:11,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:58:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:11,835 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 24 treesize of output 24 [2021-11-23 01:58:11,851 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 [2021-11-23 01:58:11,981 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2021-11-23 01:58:12,015 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:57,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2789#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:58:57,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:58:57,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:58:57,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-11-23 01:58:57,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184306890] [2021-11-23 01:58:57,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:58:57,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:58:57,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:58:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2021-11-23 01:58:57,039 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:58:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:57,104 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-11-23 01:58:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 01:58:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2021-11-23 01:58:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:57,106 INFO L225 Difference]: With dead ends: 62 [2021-11-23 01:58:57,106 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 01:58:57,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2021-11-23 01:58:57,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:57,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 01:58:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 01:58:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:58:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-23 01:58:57,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 66 [2021-11-23 01:58:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:57,116 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-23 01:58:57,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:58:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-23 01:58:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 01:58:57,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:57,119 INFO L514 BasicCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:57,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:57,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75881b97-bb7b-4d10-b8d6-8e44ec7e4679/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:57,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 631878764, now seen corresponding path program 7 times [2021-11-23 01:58:57,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:57,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698559002] [2021-11-23 01:58:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:57,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:08,849 WARN L227 SmtUtils]: Spent 1.24m on a formula simplification. DAG size of input: 138 DAG size of output: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:04:22,469 WARN L227 SmtUtils]: Spent 54.01s on a formula simplification. DAG size of input: 128 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:00,149 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 35 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:07:00,265 WARN L227 SmtUtils]: Spent 28.21s on a formula simplification. DAG size of input: 144 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:07:59,668 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 30 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)