./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.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_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/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_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/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_e1e64381-f518-486b-8c76-e8026821c247/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 1cf6b517958e8017b93e9c3e9acb9e36cc315aaa95d19ed1c0795bb5e0096c62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:03:41,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:03:41,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:03:41,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:03:41,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:03:41,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:03:41,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:03:41,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:03:41,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:03:41,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:03:41,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:03:41,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:03:41,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:03:41,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:03:41,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:03:41,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:03:41,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:03:41,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:03:41,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:03:41,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:03:41,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:03:41,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:03:41,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:03:41,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:03:41,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:03:41,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:03:41,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:03:41,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:03:41,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:03:41,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:03:41,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:03:41,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:03:41,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:03:41,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:03:41,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:03:41,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:03:41,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:03:41,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:03:41,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:03:41,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:03:41,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:03:41,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:03:41,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:03:41,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:03:41,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:03:41,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:03:41,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:03:41,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:03:41,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:03:41,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:03:41,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:03:41,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:03:41,979 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:03:41,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:03:41,980 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:03:41,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:03:41,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:03:41,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:03:41,981 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:03:41,981 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:03:41,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:03:41,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:03:41,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:03:41,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:03:41,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:03:41,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:03:41,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:03:41,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:03:41,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:03:41,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:03:41,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:03:41,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:03:41,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:03:41,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:03:41,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:03:41,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:03:41,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:03:41,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:03:41,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:03:41,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:03:41,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:03:41,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:03:41,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:03:41,991 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_e1e64381-f518-486b-8c76-e8026821c247/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cf6b517958e8017b93e9c3e9acb9e36cc315aaa95d19ed1c0795bb5e0096c62 [2021-11-23 03:03:42,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:03:42,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:03:42,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:03:42,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:03:42,383 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:03:42,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2021-11-23 03:03:42,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/data/19488dea9/110c279b86aa4de2970cbc16aea76958/FLAG3ddcbb01f [2021-11-23 03:03:43,105 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:03:43,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2021-11-23 03:03:43,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/data/19488dea9/110c279b86aa4de2970cbc16aea76958/FLAG3ddcbb01f [2021-11-23 03:03:43,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/data/19488dea9/110c279b86aa4de2970cbc16aea76958 [2021-11-23 03:03:43,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:03:43,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:03:43,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:03:43,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:03:43,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:03:43,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:43" (1/1) ... [2021-11-23 03:03:43,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6edc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:43, skipping insertion in model container [2021-11-23 03:03:43,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:43" (1/1) ... [2021-11-23 03:03:43,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:03:43,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:03:43,695 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_e1e64381-f518-486b-8c76-e8026821c247/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i[854,867] [2021-11-23 03:03:43,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:03:45,890 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:03:45,932 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_e1e64381-f518-486b-8c76-e8026821c247/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i[854,867] [2021-11-23 03:03:45,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:03:45,967 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:03:45,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45 WrapperNode [2021-11-23 03:03:45,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:03:45,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:03:45,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:03:45,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:03:45,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:45,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,016 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-23 03:03:46,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:03:46,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:03:46,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:03:46,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:03:46,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:03:46,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:03:46,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:03:46,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:03:46,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (1/1) ... [2021-11-23 03:03:46,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:03:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:46,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:03:46,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:03:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:03:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:03:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:03:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:03:46,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:03:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:03:46,341 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:03:46,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:03:46,475 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:03:46,501 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:03:46,501 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:03:46,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:46 BoogieIcfgContainer [2021-11-23 03:03:46,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:03:46,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:03:46,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:03:46,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:03:46,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:43" (1/3) ... [2021-11-23 03:03:46,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8d7083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:46, skipping insertion in model container [2021-11-23 03:03:46,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:45" (2/3) ... [2021-11-23 03:03:46,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8d7083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:46, skipping insertion in model container [2021-11-23 03:03:46,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:46" (3/3) ... [2021-11-23 03:03:46,516 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2021-11-23 03:03:46,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:03:46,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:03:46,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:03:46,591 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 03:03:46,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:03:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:03:46,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:46,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:46,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1584189431, now seen corresponding path program 1 times [2021-11-23 03:03:46,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094079144] [2021-11-23 03:03:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:46,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:46,921 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 03:03:46,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094079144] [2021-11-23 03:03:46,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094079144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:46,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:46,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:03:46,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741621703] [2021-11-23 03:03:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:46,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:03:46,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:03:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:46,986 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:47,085 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2021-11-23 03:03:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:03:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:03:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:47,099 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:03:47,100 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:03:47,104 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 03:03:47,111 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:47,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:03:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:03:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 12. [2021-11-23 03:03:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 03:03:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-23 03:03:47,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2021-11-23 03:03:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-23 03:03:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-23 03:03:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:03:47,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:47,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:03:47,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1978214720, now seen corresponding path program 1 times [2021-11-23 03:03:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:47,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748730865] [2021-11-23 03:03:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:47,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:47,257 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 03:03:47,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748730865] [2021-11-23 03:03:47,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748730865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:47,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:47,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:03:47,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869071849] [2021-11-23 03:03:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:03:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:03:47,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:47,270 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:03:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:47,301 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-11-23 03:03:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:03:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:03:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:47,304 INFO L225 Difference]: With dead ends: 23 [2021-11-23 03:03:47,304 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 03:03:47,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:47,308 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:47,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:03:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 03:03:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 03:03:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 03:03:47,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-23 03:03:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:47,325 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 03:03:47,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:03:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 03:03:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:03:47,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:47,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:47,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:03:47,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -20142429, now seen corresponding path program 1 times [2021-11-23 03:03:47,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617139459] [2021-11-23 03:03:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:47,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:47,402 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 03:03:47,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617139459] [2021-11-23 03:03:47,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617139459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706711596] [2021-11-23 03:03:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:47,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:47,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:47,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:03:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:03:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:47,591 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 03:03:47,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:47,633 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 03:03:47,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706711596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:47,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115815222] [2021-11-23 03:03:47,658 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:03:47,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:03:47,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:03:47,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:03:47,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:03:47,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:03:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:03:48,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 161 [2021-11-23 03:03:48,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:03:48,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:03:48,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '170#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:03:48,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:03:48,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:03:48,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 03:03:48,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172257819] [2021-11-23 03:03:48,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:03:48,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:03:48,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:03:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:03:48,566 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:48,656 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-23 03:03:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:03:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:03:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:48,658 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:03:48,658 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:03:48,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:03:48,661 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:48,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:03:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:03:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 18. [2021-11-23 03:03:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-23 03:03:48,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 9 [2021-11-23 03:03:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-23 03:03:48,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-23 03:03:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:03:48,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:48,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:03:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 03:03:48,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -840611673, now seen corresponding path program 2 times [2021-11-23 03:03:48,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707515397] [2021-11-23 03:03:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:48,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:49,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707515397] [2021-11-23 03:03:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707515397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501847421] [2021-11-23 03:03:49,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:03:49,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:49,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:49,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:49,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:03:49,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:03:49,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:03:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:03:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:49,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:49,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501847421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956708037] [2021-11-23 03:03:49,347 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:03:49,347 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:03:49,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:03:49,348 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:03:49,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:03:49,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:03:49,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:03:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 161 [2021-11-23 03:03:49,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:03:49,794 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:03:49,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '356#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:03:49,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:03:49,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:03:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 03:03:49,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126128457] [2021-11-23 03:03:49,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:03:49,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:03:49,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:03:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:03:49,993 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 03:03:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:50,135 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-11-23 03:03:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:03:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:03:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:50,141 INFO L225 Difference]: With dead ends: 102 [2021-11-23 03:03:50,144 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 03:03:50,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:03:50,150 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:50,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:03:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 03:03:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 30. [2021-11-23 03:03:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-23 03:03:50,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 15 [2021-11-23 03:03:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-23 03:03:50,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 03:03:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-23 03:03:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:03:50,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:50,173 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:50,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:03:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:50,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -11070545, now seen corresponding path program 3 times [2021-11-23 03:03:50,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:50,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436399560] [2021-11-23 03:03:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:50,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:50,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436399560] [2021-11-23 03:03:50,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436399560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713783784] [2021-11-23 03:03:50,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:03:50,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:50,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:03:50,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:03:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:03:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:03:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713783784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776150832] [2021-11-23 03:03:51,273 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:03:51,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:03:51,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:03:51,274 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:03:51,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:03:51,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:03:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:03:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 161 [2021-11-23 03:03:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:03:51,581 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:03:51,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '710#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:03:51,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:03:51,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:03:51,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 03:03:51,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970290404] [2021-11-23 03:03:51,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:03:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:03:51,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:03:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=537, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:03:51,775 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 03:03:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:52,089 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-11-23 03:03:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:03:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:03:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:52,096 INFO L225 Difference]: With dead ends: 210 [2021-11-23 03:03:52,097 INFO L226 Difference]: Without dead ends: 202 [2021-11-23 03:03:52,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=537, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:03:52,099 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 381 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:52,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 89 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:03:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-23 03:03:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 54. [2021-11-23 03:03:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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 03:03:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-23 03:03:52,126 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 27 [2021-11-23 03:03:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-23 03:03:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 03:03:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-23 03:03:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:03:52,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:52,130 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:52,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:03:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:52,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2037660225, now seen corresponding path program 4 times [2021-11-23 03:03:52,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:52,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198471572] [2021-11-23 03:03:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:52,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:52,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198471572] [2021-11-23 03:03:52,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198471572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53358908] [2021-11-23 03:03:52,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:03:52,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:52,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:52,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:52,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:03:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:03:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:54,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53358908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277794146] [2021-11-23 03:03:54,278 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:03:54,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:03:54,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:03:54,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:03:54,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:03:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:03:54,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:03:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:54,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 166 [2021-11-23 03:03:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:03:54,554 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:03:54,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1400#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:03:54,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:03:54,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:03:54,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-23 03:03:54,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49703478] [2021-11-23 03:03:54,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:03:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:03:54,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:03:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=1629, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 03:03:54,780 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 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 03:03:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:55,609 INFO L93 Difference]: Finished difference Result 426 states and 451 transitions. [2021-11-23 03:03:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 03:03:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 03:03:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:55,612 INFO L225 Difference]: With dead ends: 426 [2021-11-23 03:03:55,613 INFO L226 Difference]: Without dead ends: 418 [2021-11-23 03:03:55,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1341, Invalid=1629, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 03:03:55,616 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 802 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:55,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 185 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:03:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-23 03:03:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 102. [2021-11-23 03:03:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 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 03:03:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-23 03:03:55,629 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 51 [2021-11-23 03:03:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:55,629 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-23 03:03:55,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 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 03:03:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-23 03:03:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:03:55,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:55,634 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:55,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:03:55,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:55,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -13526561, now seen corresponding path program 5 times [2021-11-23 03:03:55,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652191153] [2021-11-23 03:03:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:55,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:03:57,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:57,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652191153] [2021-11-23 03:03:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652191153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:57,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013725967] [2021-11-23 03:03:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:03:57,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:57,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:57,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:06:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-23 03:06:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:06:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 03:06:18,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:06:18,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:06:22,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013725967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:06:22,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [623262066] [2021-11-23 03:06:22,142 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:06:22,142 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:06:22,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:06:22,143 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:06:22,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:06:22,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:06:22,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:06:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:22,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 166 [2021-11-23 03:06:22,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:06:22,422 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:06:22,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2762#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:06:22,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:06:22,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:06:22,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-23 03:06:22,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852374755] [2021-11-23 03:06:22,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:06:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 03:06:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 03:06:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4965, Invalid=5541, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 03:06:22,647 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 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 03:06:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:25,698 INFO L93 Difference]: Finished difference Result 858 states and 907 transitions. [2021-11-23 03:06:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 03:06:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 03:06:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:25,708 INFO L225 Difference]: With dead ends: 858 [2021-11-23 03:06:25,708 INFO L226 Difference]: Without dead ends: 850 [2021-11-23 03:06:25,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4965, Invalid=5541, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 03:06:25,714 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2613 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2613 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:25,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2613 Valid, 381 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:06:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-23 03:06:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 198. [2021-11-23 03:06:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 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 03:06:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-11-23 03:06:25,744 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 99 [2021-11-23 03:06:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:25,745 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-11-23 03:06:25,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 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 03:06:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-11-23 03:06:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 03:06:25,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:25,751 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:25,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:06:25,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:25,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1227817503, now seen corresponding path program 6 times [2021-11-23 03:06:25,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:25,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138351753] [2021-11-23 03:06:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:25,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:06:29,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138351753] [2021-11-23 03:06:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138351753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:06:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499407844] [2021-11-23 03:06:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:06:29,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:29,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:29,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:11:21,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:11:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:11:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 03:11:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:22,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:32,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499407844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:32,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290028023] [2021-11-23 03:11:32,179 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:11:32,179 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:32,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:32,180 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:32,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:32,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:11:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:11:32,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:32,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 161 [2021-11-23 03:11:32,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:11:32,358 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:32,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5468#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:11:32,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:32,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:11:32,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-23 03:11:32,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599426585] [2021-11-23 03:11:32,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:32,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-23 03:11:32,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-23 03:11:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19125, Invalid=20277, Unknown=0, NotChecked=0, Total=39402 [2021-11-23 03:11:32,671 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 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 03:11:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:56,355 INFO L93 Difference]: Finished difference Result 1722 states and 1819 transitions. [2021-11-23 03:11:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-23 03:11:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-23 03:11:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:56,366 INFO L225 Difference]: With dead ends: 1722 [2021-11-23 03:11:56,367 INFO L226 Difference]: Without dead ends: 1714 [2021-11-23 03:11:56,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=19125, Invalid=20277, Unknown=0, NotChecked=0, Total=39402 [2021-11-23 03:11:56,374 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5158 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5158 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:56,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5158 Valid, 761 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:11:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-11-23 03:11:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 390. [2021-11-23 03:11:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0051413881748072) internal successors, (391), 389 states have internal predecessors, (391), 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 03:11:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 391 transitions. [2021-11-23 03:11:56,412 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 391 transitions. Word has length 195 [2021-11-23 03:11:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:56,413 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 391 transitions. [2021-11-23 03:11:56,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.010362694300518) internal successors, (388), 192 states have internal predecessors, (388), 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 03:11:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 391 transitions. [2021-11-23 03:11:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-23 03:11:56,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:56,433 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:56,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:11:56,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:56,647 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1039192735, now seen corresponding path program 7 times [2021-11-23 03:11:56,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524463635] [2021-11-23 03:11:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:56,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:10,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524463635] [2021-11-23 03:12:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524463635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729150357] [2021-11-23 03:12:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:12:10,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:10,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:10,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e64381-f518-486b-8c76-e8026821c247/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:12:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-23 03:12:10,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:11,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:49,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729150357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:49,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964458547] [2021-11-23 03:12:49,932 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:12:49,933 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:49,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:49,933 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:49,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:49,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 03:12:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:12:50,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:50,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 161 [2021-11-23 03:12:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:12:50,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:50,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10862#(and (<= |ULTIMATE.start_main_~c~0#1| 5) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |~#s~0.base|) (+ |~#s~0.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:12:50,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:50,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:12:50,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-23 03:12:50,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757468469] [2021-11-23 03:12:50,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-23 03:12:50,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-23 03:12:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75093, Invalid=77397, Unknown=0, NotChecked=0, Total=152490 [2021-11-23 03:12:50,570 INFO L87 Difference]: Start difference. First operand 390 states and 391 transitions. Second operand has 385 states, 385 states have (on average 2.005194805194805) internal successors, (772), 384 states have internal predecessors, (772), 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)