./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.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_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/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_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/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_2cabb4cc-dc83-4e30-93f3-4ef870915206/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 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:44:44,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:44:44,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:44:44,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:44:44,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:44:44,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:44:44,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:44:44,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:44:44,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:44:44,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:44:44,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:44:44,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:44:44,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:44:44,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:44:44,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:44:44,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:44:44,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:44:44,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:44:44,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:44:44,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:44:44,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:44:44,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:44:44,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:44:44,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:44:44,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:44:44,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:44:44,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:44:44,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:44:44,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:44:44,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:44:44,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:44:44,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:44:44,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:44:44,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:44:44,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:44:44,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:44:44,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:44:44,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:44:44,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:44:44,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:44:44,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:44:44,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:44:44,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:44:44,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:44:44,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:44:44,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:44:44,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:44:44,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:44:44,978 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:44:44,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:44:44,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:44:44,979 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:44:44,980 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:44:44,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:44:44,981 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:44:44,981 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:44:44,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:44:44,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:44:44,982 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:44:44,982 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:44:44,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:44:44,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:44:44,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:44:44,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:44:44,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:44:44,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:44:44,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:44:44,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:44:44,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:44:44,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:44:44,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:44:44,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:44:44,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:44:44,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:44:44,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:44:44,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:44:44,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:44:44,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:44:44,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:44:44,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:44:44,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:44:44,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:44:44,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:44:44,991 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_2cabb4cc-dc83-4e30-93f3-4ef870915206/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf [2021-11-23 03:44:45,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:44:45,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:44:45,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:44:45,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:44:45,335 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:44:45,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2021-11-23 03:44:45,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/data/995ad7ee0/a678c3b3dbb44e4a8dbe17255a3b462c/FLAG2ebb11e88 [2021-11-23 03:44:45,974 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:44:45,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2021-11-23 03:44:45,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/data/995ad7ee0/a678c3b3dbb44e4a8dbe17255a3b462c/FLAG2ebb11e88 [2021-11-23 03:44:46,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/data/995ad7ee0/a678c3b3dbb44e4a8dbe17255a3b462c [2021-11-23 03:44:46,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:44:46,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:44:46,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:44:46,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:44:46,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:44:46,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538937b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46, skipping insertion in model container [2021-11-23 03:44:46,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:44:46,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:44:46,583 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_2cabb4cc-dc83-4e30-93f3-4ef870915206/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2021-11-23 03:44:46,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:44:46,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:44:46,636 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_2cabb4cc-dc83-4e30-93f3-4ef870915206/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2021-11-23 03:44:46,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:44:46,669 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:44:46,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46 WrapperNode [2021-11-23 03:44:46,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:44:46,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:44:46,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:44:46,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:44:46,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,755 INFO L137 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2021-11-23 03:44:46,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:44:46,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:44:46,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:44:46,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:44:46,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:44:46,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:44:46,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:44:46,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:44:46,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (1/1) ... [2021-11-23 03:44:46,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:44:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:46,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:44:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:44:46,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:44:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:44:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:44:46,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:44:46,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:44:46,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:44:46,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:44:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:44:47,080 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:44:47,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:44:47,302 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:44:47,387 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:44:47,402 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-23 03:44:47,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:44:47 BoogieIcfgContainer [2021-11-23 03:44:47,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:44:47,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:44:47,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:44:47,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:44:47,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:44:46" (1/3) ... [2021-11-23 03:44:47,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:44:47, skipping insertion in model container [2021-11-23 03:44:47,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:44:46" (2/3) ... [2021-11-23 03:44:47,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:44:47, skipping insertion in model container [2021-11-23 03:44:47,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:44:47" (3/3) ... [2021-11-23 03:44:47,415 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2021-11-23 03:44:47,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:44:47,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:44:47,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:44:47,490 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 03:44:47,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:44:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:44:47,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:47,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:47,516 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1059155307, now seen corresponding path program 1 times [2021-11-23 03:44:47,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799867012] [2021-11-23 03:44:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:47,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:47,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799867012] [2021-11-23 03:44:47,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799867012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:44:47,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:44:47,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:44:47,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571981762] [2021-11-23 03:44:47,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:44:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:44:47,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:44:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:44:47,793 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:47,867 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2021-11-23 03:44:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:44:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:44:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:47,884 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:44:47,886 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 03:44:47,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:44:47,900 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:47,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:44:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 03:44:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 03:44:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-11-23 03:44:47,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 11 [2021-11-23 03:44:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-11-23 03:44:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2021-11-23 03:44:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:44:47,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:47,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:47,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:44:47,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash -648244413, now seen corresponding path program 1 times [2021-11-23 03:44:47,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:47,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324789304] [2021-11-23 03:44:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:47,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:48,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324789304] [2021-11-23 03:44:48,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324789304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791987375] [2021-11-23 03:44:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:48,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:48,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:48,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:44:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:48,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:44:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:48,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:44:48,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791987375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:44:48,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:44:48,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 03:44:48,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399497233] [2021-11-23 03:44:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:44:48,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:44:48,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:44:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:44:48,261 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:48,351 INFO L93 Difference]: Finished difference Result 30 states and 48 transitions. [2021-11-23 03:44:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:44:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:44:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:48,356 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:44:48,356 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:44:48,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 03:44:48,368 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:48,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:44:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:44:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 03:44:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-23 03:44:48,388 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2021-11-23 03:44:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:48,389 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-23 03:44:48,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-23 03:44:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:44:48,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:48,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:48,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:48,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:48,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -331017239, now seen corresponding path program 1 times [2021-11-23 03:44:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:48,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060116171] [2021-11-23 03:44:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:48,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:44:48,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:48,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060116171] [2021-11-23 03:44:48,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060116171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749730809] [2021-11-23 03:44:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:48,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:48,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:48,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:44:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:44:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:44:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:44:48,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749730809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629409941] [2021-11-23 03:44:48,997 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:44:48,997 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:49,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:49,009 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:49,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:49,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,848 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:44:49,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:44:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:49,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:44:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:50,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:44:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:50,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:50,892 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:44:50,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:44:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,141 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:44:53,141 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:44:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,197 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:53,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,315 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:53,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,391 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:53,443 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:53,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:53,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,549 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:44:53,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:44:53,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,675 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:53,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:53,722 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:53,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,857 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:44:53,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:44:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,006 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,055 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,146 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:54,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:54,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,223 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,270 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,356 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,419 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,461 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,575 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:44:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:44:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,683 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:54,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:54,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:44:55,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:44:55,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:44:55,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:44:55,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 03:44:55,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372238806] [2021-11-23 03:44:55,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:55,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:44:55,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:55,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:44:55,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:44:55,052 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:55,110 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 03:44:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:44:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:44:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:55,112 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:44:55,112 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:44:55,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:44:55,114 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:55,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:44:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:44:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 03:44:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-23 03:44:55,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 18 [2021-11-23 03:44:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:55,122 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-23 03:44:55,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-23 03:44:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:44:55,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:55,124 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:55,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:55,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:55,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1000203793, now seen corresponding path program 2 times [2021-11-23 03:44:55,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:55,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328601906] [2021-11-23 03:44:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:55,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:44:55,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328601906] [2021-11-23 03:44:55,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328601906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483209782] [2021-11-23 03:44:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:44:55,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:55,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:44:55,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:44:55,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:44:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:44:55,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:44:55,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:44:55,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483209782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296630194] [2021-11-23 03:44:55,625 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:44:55,625 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:55,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:55,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:55,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:55,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,188 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:44:56,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:44:56,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:44:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 03:44:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,745 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:44:56,746 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 7 case distinctions, treesize of input 724 treesize of output 692 [2021-11-23 03:44:56,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,970 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:44:56,971 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:44:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,024 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,096 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:57,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,153 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,202 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:57,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,307 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:44:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:44:57,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,411 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,463 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,538 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:57,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,600 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,664 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:57,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,748 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:44:57,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:44:57,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,830 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:57,879 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:58,002 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:44:58,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:44:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:58,116 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:58,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:58,159 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:44:58,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:44:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:58,284 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:44:58,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:44:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:58,397 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:44:58,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:44:58,432 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:44:58,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:44:58,746 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:44:58,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:44:58,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 03:44:58,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422339889] [2021-11-23 03:44:58,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:58,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:44:58,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:44:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:44:58,748 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:58,887 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-11-23 03:44:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:44:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 03:44:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:58,889 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:44:58,889 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:44:58,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:44:58,890 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:58,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:44:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:44:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:44:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-23 03:44:58,900 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2021-11-23 03:44:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:58,900 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-23 03:44:58,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:44:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-23 03:44:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:44:58,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:58,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:58,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:59,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:59,126 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1063405291, now seen corresponding path program 3 times [2021-11-23 03:44:59,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791333427] [2021-11-23 03:44:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:59,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:44:59,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791333427] [2021-11-23 03:44:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791333427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627556216] [2021-11-23 03:44:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:44:59,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:59,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:59,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:44:59,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:44:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:44:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:44:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:44:59,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:44:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627556216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597501425] [2021-11-23 03:44:59,586 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:44:59,587 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:59,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:59,587 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:59,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:59,938 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:44:59,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:45:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,406 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:00,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:45:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:00,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:00,905 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:45:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:45:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,557 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:01,558 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:01,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,601 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,665 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:01,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,723 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:01,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:01,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,777 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:01,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:01,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,826 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:01,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:01,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,878 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:01,922 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:01,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,002 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:02,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,071 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,105 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,166 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:02,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,215 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,247 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:02,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:02,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,355 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:02,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:02,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,430 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,467 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:02,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,556 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:02,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:02,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:02,607 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:02,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:02,633 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:02,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:02,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:02,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 03:45:02,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106291598] [2021-11-23 03:45:02,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:02,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:45:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:45:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:45:02,892 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:02,975 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-11-23 03:45:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:45:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 03:45:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:02,976 INFO L225 Difference]: With dead ends: 82 [2021-11-23 03:45:02,976 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 03:45:02,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:45:02,978 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:02,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 03:45:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 03:45:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-23 03:45:02,988 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2021-11-23 03:45:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:02,989 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-23 03:45:02,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-23 03:45:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:45:02,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:02,992 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:03,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:03,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:03,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1024767979, now seen corresponding path program 4 times [2021-11-23 03:45:03,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906358214] [2021-11-23 03:45:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:03,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:45:03,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906358214] [2021-11-23 03:45:03,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906358214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002789493] [2021-11-23 03:45:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:45:03,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:03,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:03,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:45:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:45:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:45:03,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:45:03,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002789493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:03,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426663156] [2021-11-23 03:45:03,834 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:03,834 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:03,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:03,835 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:03,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,258 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:04,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:45:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:45:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,725 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:45:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:45:05,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,569 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:05,569 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:05,602 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:05,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,723 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,801 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:05,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:05,839 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:05,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,951 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,026 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,060 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,127 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,178 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,214 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:06,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,309 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:06,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,390 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,424 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:06,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,530 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:06,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,620 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,659 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,732 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,781 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:06,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:06,809 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:07,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:07,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:07,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:07,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 03:45:07,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403203991] [2021-11-23 03:45:07,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:07,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:45:07,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:45:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:45:07,110 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:07,229 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2021-11-23 03:45:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:45:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-23 03:45:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:07,231 INFO L225 Difference]: With dead ends: 94 [2021-11-23 03:45:07,231 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 03:45:07,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:45:07,233 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:07,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 03:45:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 03:45:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 03:45:07,250 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2021-11-23 03:45:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:07,250 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 03:45:07,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 03:45:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 03:45:07,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:07,257 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:07,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:45:07,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:07,482 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash 637491691, now seen corresponding path program 5 times [2021-11-23 03:45:07,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843716455] [2021-11-23 03:45:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:07,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:45:07,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843716455] [2021-11-23 03:45:07,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843716455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196990811] [2021-11-23 03:45:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:07,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:08,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:08,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:45:08,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:45:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:45:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-23 03:45:08,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-23 03:45:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196990811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:08,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562997690] [2021-11-23 03:45:08,576 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:08,576 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:08,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:08,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:08,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,844 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:45:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:45:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,227 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:45:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:09,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:09,671 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:45:09,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:45:10,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,284 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:10,284 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:10,332 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,422 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,502 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:10,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:10,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,544 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:10,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,630 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,678 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:10,709 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:10,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,783 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,865 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:10,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:10,913 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:10,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:10,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,009 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:11,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:11,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,092 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:11,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:11,127 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:11,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:11,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,253 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:11,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,332 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:11,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:11,364 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:11,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,466 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:11,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:11,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:11,538 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:11,561 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:11,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:11,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:11,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:11,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2021-11-23 03:45:11,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919696477] [2021-11-23 03:45:11,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:11,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 03:45:11,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 03:45:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:45:11,870 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:12,258 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2021-11-23 03:45:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 03:45:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 03:45:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:12,260 INFO L225 Difference]: With dead ends: 131 [2021-11-23 03:45:12,260 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:45:12,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:45:12,263 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:12,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:45:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:45:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 03:45:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-11-23 03:45:12,283 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 57 [2021-11-23 03:45:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:12,283 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-11-23 03:45:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-11-23 03:45:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:45:12,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:12,291 INFO L514 BasicCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:12,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:12,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:12,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1002141443, now seen corresponding path program 6 times [2021-11-23 03:45:12,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986294991] [2021-11-23 03:45:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:13,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986294991] [2021-11-23 03:45:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986294991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466077732] [2021-11-23 03:45:13,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:45:13,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:13,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:13,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:45:13,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:45:13,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:45:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:13,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:14,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466077732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383561101] [2021-11-23 03:45:14,273 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:14,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:14,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:14,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:14,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,547 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:45:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:45:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,921 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 03:45:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,367 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:45:15,367 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 7 case distinctions, treesize of input 724 treesize of output 692 [2021-11-23 03:45:15,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,502 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:15,502 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:15,541 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:15,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,617 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:15,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,684 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,722 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:15,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:15,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,784 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:15,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,826 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:15,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:15,868 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:15,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,969 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:15,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,055 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:16,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,093 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,192 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:16,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:16,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,271 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,311 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:16,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,423 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:16,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:16,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,517 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,557 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:16,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,622 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:16,679 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:16,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,714 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:17,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3249#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:17,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:17,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-23 03:45:17,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933411720] [2021-11-23 03:45:17,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 03:45:17,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 03:45:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 03:45:17,138 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:17,321 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-11-23 03:45:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 03:45:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-23 03:45:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:17,325 INFO L225 Difference]: With dead ends: 192 [2021-11-23 03:45:17,326 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 03:45:17,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 03:45:17,329 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:17,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 03:45:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 03:45:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2021-11-23 03:45:17,353 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 94 [2021-11-23 03:45:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:17,354 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2021-11-23 03:45:17,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2021-11-23 03:45:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 03:45:17,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:17,357 INFO L514 BasicCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:17,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:45:17,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1978329557, now seen corresponding path program 7 times [2021-11-23 03:45:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584510480] [2021-11-23 03:45:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:19,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584510480] [2021-11-23 03:45:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584510480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241418242] [2021-11-23 03:45:19,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:45:19,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:19,034 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:19,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:45:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 03:45:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:19,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:22,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241418242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:22,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929487723] [2021-11-23 03:45:22,307 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:22,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:22,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:22,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:22,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,629 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:45:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:45:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:23,001 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:23,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:23,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:45:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:23,433 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:45:23,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:45:24,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,046 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:24,046 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:24,098 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,203 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,303 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,337 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,383 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:24,383 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 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,428 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,460 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,529 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,589 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,621 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,721 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:24,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,801 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,838 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:24,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,907 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:24,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:24,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,956 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:24,990 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:24,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:25,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:25,057 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:25,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:25,115 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:25,144 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:25,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:25,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:25,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:25,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2021-11-23 03:45:25,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447643704] [2021-11-23 03:45:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:25,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 03:45:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 03:45:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 03:45:25,647 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:26,033 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2021-11-23 03:45:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 03:45:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 03:45:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:26,036 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:45:26,036 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 03:45:26,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 03:45:26,048 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:26,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:45:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 03:45:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-23 03:45:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 178 transitions. [2021-11-23 03:45:26,076 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 178 transitions. Word has length 119 [2021-11-23 03:45:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:26,079 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 178 transitions. [2021-11-23 03:45:26,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 178 transitions. [2021-11-23 03:45:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 03:45:26,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:26,092 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:26,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 03:45:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:26,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1103223083, now seen corresponding path program 8 times [2021-11-23 03:45:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738486862] [2021-11-23 03:45:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:45:30,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738486862] [2021-11-23 03:45:30,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738486862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082920714] [2021-11-23 03:45:30,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:30,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:30,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:30,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:30,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:45:51,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 03:45:51,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:45:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2021-11-23 03:45:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2021-11-23 03:45:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082920714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:52,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098951257] [2021-11-23 03:45:52,639 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:52,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:52,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:52,640 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:52,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,070 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:45:53,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:45:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:45:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 03:45:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,556 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:45:53,557 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 7 case distinctions, treesize of input 724 treesize of output 692 [2021-11-23 03:45:53,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,753 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:45:53,754 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:45:53,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,796 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:53,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,864 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:53,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,908 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:53,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,940 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:53,996 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:53,996 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 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,033 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,081 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,158 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:45:54,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:45:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,229 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,258 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:54,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:54,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,313 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:54,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,354 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,403 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:54,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,521 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:45:54,522 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 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:45:54,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,562 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,592 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:54,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:54,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,690 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:45:54,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:45:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:54,772 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:45:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:54,798 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:55,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6623#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:55,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:55,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:55,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2021-11-23 03:45:55,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814394899] [2021-11-23 03:45:55,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 03:45:55,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:55,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 03:45:55,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 03:45:55,471 INFO L87 Difference]: Start difference. First operand 171 states and 178 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:56,206 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2021-11-23 03:45:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 03:45:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-23 03:45:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:56,209 INFO L225 Difference]: With dead ends: 315 [2021-11-23 03:45:56,210 INFO L226 Difference]: Without dead ends: 244 [2021-11-23 03:45:56,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 03:45:56,218 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:56,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:45:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-23 03:45:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-11-23 03:45:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0329218106995885) internal successors, (251), 243 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2021-11-23 03:45:56,240 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 169 [2021-11-23 03:45:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:56,241 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2021-11-23 03:45:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2021-11-23 03:45:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 03:45:56,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:56,246 INFO L514 BasicCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:56,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:56,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:45:56,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:45:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash -673224829, now seen corresponding path program 9 times [2021-11-23 03:45:56,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:56,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120218842] [2021-11-23 03:45:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:56,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:46:00,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120218842] [2021-11-23 03:46:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120218842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689549778] [2021-11-23 03:46:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:46:00,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:00,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:46:01,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:46:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 03:46:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:46:01,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:46:13,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689549778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254080981] [2021-11-23 03:46:13,010 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:46:13,010 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:13,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:13,011 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:13,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,229 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:46:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:46:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,639 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:46:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:46:13,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 03:46:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,040 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:46:14,041 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 7 case distinctions, treesize of input 724 treesize of output 692 [2021-11-23 03:46:14,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,162 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:46:14,163 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:46:14,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,196 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,243 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:46:14,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:46:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,283 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,306 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:46:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:46:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,371 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:46:14,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:46:14,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,473 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,503 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,546 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:46:14,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:46:14,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,584 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,610 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,657 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:46:14,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:46:14,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,695 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,720 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:46:14,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:46:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,784 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:46:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:46:14,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,849 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,880 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,932 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:46:14,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:46:14,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:14,969 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:46:14,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:14,989 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:15,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9381#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:15,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:15,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:15,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2021-11-23 03:46:15,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212113336] [2021-11-23 03:46:15,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:15,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 03:46:15,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 03:46:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 03:46:15,546 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:16,196 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2021-11-23 03:46:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 03:46:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-11-23 03:46:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:16,199 INFO L225 Difference]: With dead ends: 488 [2021-11-23 03:46:16,199 INFO L226 Difference]: Without dead ends: 345 [2021-11-23 03:46:16,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 03:46:16,204 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:16,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:46:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-23 03:46:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-11-23 03:46:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2021-11-23 03:46:16,220 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 242 [2021-11-23 03:46:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:16,220 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2021-11-23 03:46:16,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2021-11-23 03:46:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-23 03:46:16,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:16,227 INFO L514 BasicCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:16,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:16,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:16,454 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -161094485, now seen corresponding path program 10 times [2021-11-23 03:46:16,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:16,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309460740] [2021-11-23 03:46:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:16,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:46:31,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309460740] [2021-11-23 03:46:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309460740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885527578] [2021-11-23 03:46:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:46:31,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:31,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:46:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:31,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 03:46:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:46:32,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:47:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885527578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788630440] [2021-11-23 03:47:13,699 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:47:13,700 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:13,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:13,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:13,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,002 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:47:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:47:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,347 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:47:14,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:47:14,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 03:47:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:14,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:14,644 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:47:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 704 treesize of output 694 [2021-11-23 03:47:15,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,200 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 03:47:15,200 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 03:47:15,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,231 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,272 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:47:15,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:47:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,309 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,334 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,403 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:47:15,403 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 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:47:15,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,446 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,475 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,526 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:47:15,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:47:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,560 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,586 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:15,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:47:15,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,648 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:47:15,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:47:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,736 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,763 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:15,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:47:15,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,830 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:47:15,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:47:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,887 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:15,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:15,937 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:15,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:47:15,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:16,019 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:47:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:47:16,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:16,094 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:47:16,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:47:16,139 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:22,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13495#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:22,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:22,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2021-11-23 03:47:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058979002] [2021-11-23 03:47:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 03:47:22,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 03:47:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 03:47:22,181 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:25,174 INFO L93 Difference]: Finished difference Result 690 states and 905 transitions. [2021-11-23 03:47:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 03:47:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2021-11-23 03:47:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:25,178 INFO L225 Difference]: With dead ends: 690 [2021-11-23 03:47:25,178 INFO L226 Difference]: Without dead ends: 547 [2021-11-23 03:47:25,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 798 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 03:47:25,232 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:25,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:47:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-23 03:47:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-23 03:47:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0146520146520146) internal successors, (554), 546 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 554 transitions. [2021-11-23 03:47:25,256 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 554 transitions. Word has length 343 [2021-11-23 03:47:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:25,257 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 554 transitions. [2021-11-23 03:47:25,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 554 transitions. [2021-11-23 03:47:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-23 03:47:25,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:25,271 INFO L514 BasicCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:25,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 03:47:25,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:47:25,486 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1132047275, now seen corresponding path program 11 times [2021-11-23 03:47:25,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:25,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486873553] [2021-11-23 03:47:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:25,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:48:21,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486873553] [2021-11-23 03:48:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486873553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701813761] [2021-11-23 03:48:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:48:21,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:21,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cabb4cc-dc83-4e30-93f3-4ef870915206/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process