./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_02.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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/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 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:17:35,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:17:35,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:17:35,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:17:35,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:17:35,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:17:35,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:17:35,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:17:35,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:17:35,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:17:35,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:17:35,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:17:35,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:17:35,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:17:35,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:17:35,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:17:35,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:17:35,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:17:35,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:17:35,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:17:35,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:17:35,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:17:35,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:17:35,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:17:35,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:17:35,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:17:35,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:17:35,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:17:35,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:17:35,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:17:35,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:17:35,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:17:35,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:17:35,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:17:35,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:17:35,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:17:35,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:17:35,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:17:35,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:17:35,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:17:35,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:17:35,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:17:35,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:17:35,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:17:35,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:17:35,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:17:35,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:17:35,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:17:35,404 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:17:35,405 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:17:35,405 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:17:35,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:17:35,406 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:17:35,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:17:35,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:17:35,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:17:35,407 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:17:35,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:17:35,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:17:35,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:17:35,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:17:35,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:17:35,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:17:35,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:17:35,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:17:35,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:17:35,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:17:35,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:17:35,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:17:35,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:17:35,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:17:35,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:17:35,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:17:35,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:17:35,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:17:35,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:17:35,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:17:35,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:17:35,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:17:35,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:17:35,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:17:35,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:17:35,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:17:35,414 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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2021-11-23 03:17:35,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:17:35,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:17:35,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:17:35,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:17:35,747 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:17:35,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_two_index_02.i [2021-11-23 03:17:35,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/data/104e8f946/7f8e4332334f465bbb3235a2743b2995/FLAGa0b8752b6 [2021-11-23 03:17:36,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:17:36,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/sv-benchmarks/c/array-examples/standard_two_index_02.i [2021-11-23 03:17:36,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/data/104e8f946/7f8e4332334f465bbb3235a2743b2995/FLAGa0b8752b6 [2021-11-23 03:17:36,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/data/104e8f946/7f8e4332334f465bbb3235a2743b2995 [2021-11-23 03:17:36,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:17:36,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:17:36,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:17:36,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:17:36,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:17:36,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22471b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36, skipping insertion in model container [2021-11-23 03:17:36,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:17:36,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:17:36,877 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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2021-11-23 03:17:36,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:17:36,911 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:17:36,924 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_319a23fc-fa26-4c42-81ca-61c9d376cd8e/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2021-11-23 03:17:36,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:17:36,945 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:17:36,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36 WrapperNode [2021-11-23 03:17:36,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:17:36,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:17:36,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:17:36,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:17:36,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,983 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-23 03:17:36,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:17:36,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:17:36,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:17:36,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:17:36,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:36,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:37,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:37,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:37,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:37,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:17:37,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:17:37,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:17:37,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:17:37,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (1/1) ... [2021-11-23 03:17:37,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:17:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:37,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:17:37,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:17:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:17:37,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:17:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:17:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:17:37,177 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:17:37,178 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:17:37,335 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:17:37,362 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:17:37,362 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:17:37,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:37 BoogieIcfgContainer [2021-11-23 03:17:37,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:17:37,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:17:37,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:17:37,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:17:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:17:36" (1/3) ... [2021-11-23 03:17:37,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e836a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:37, skipping insertion in model container [2021-11-23 03:17:37,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:36" (2/3) ... [2021-11-23 03:17:37,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e836a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:37, skipping insertion in model container [2021-11-23 03:17:37,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:37" (3/3) ... [2021-11-23 03:17:37,376 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2021-11-23 03:17:37,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:17:37,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:17:37,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:17:37,455 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 03:17:37,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:17:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:17:37,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:37,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:17:37,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2021-11-23 03:17:37,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831443177] [2021-11-23 03:17:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:37,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:37,813 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 03:17:37,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:37,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831443177] [2021-11-23 03:17:37,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831443177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:17:37,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:17:37,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:17:37,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461848829] [2021-11-23 03:17:37,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:17:37,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:17:37,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:17:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:17:37,874 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:37,916 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-23 03:17:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:17:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:17:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:37,927 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:17:37,928 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 03:17:37,931 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 03:17:37,936 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:37,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:17:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 03:17:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 03:17:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-23 03:17:37,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-23 03:17:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:37,969 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-23 03:17:37,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-23 03:17:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:17:37,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:37,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:17:37,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:37,973 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2021-11-23 03:17:37,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:37,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588865834] [2021-11-23 03:17:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:37,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:38,024 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 03:17:38,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588865834] [2021-11-23 03:17:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588865834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306860105] [2021-11-23 03:17:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:38,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:38,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:17:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:17:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:38,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:17:38,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306860105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:17:38,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:17:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-23 03:17:38,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94222570] [2021-11-23 03:17:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:17:38,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:17:38,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:17:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:17:38,190 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:17:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:38,238 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-23 03:17:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:17:38,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:17:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:38,240 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:17:38,240 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:17:38,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:17:38,244 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:17:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:17:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2021-11-23 03:17:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 03:17:38,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-23 03:17:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:38,256 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 03:17:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:17:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 03:17:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:17:38,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:38,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:38,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:38,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:38,478 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2021-11-23 03:17:38,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:38,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918970258] [2021-11-23 03:17:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:38,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:38,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:38,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918970258] [2021-11-23 03:17:38,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918970258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:38,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031997977] [2021-11-23 03:17:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:38,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:38,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:38,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:17:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:17:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:38,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031997977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779049797] [2021-11-23 03:17:38,672 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:17:38,673 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:38,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:38,685 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:38,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:38,819 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:17:38,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:17:38,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:38,896 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:17:38,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:17:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:38,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:17:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,165 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:17:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 03:17:39,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:17:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,391 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 17 treesize of output 17 [2021-11-23 03:17:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:39,532 INFO L354 Elim1Store]: treesize reduction 110, result has 30.8 percent of original size [2021-11-23 03:17:39,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2021-11-23 03:17:39,676 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:17:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:17:39,699 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:39,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:39,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:39,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:39,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 03:17:39,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261939410] [2021-11-23 03:17:39,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:39,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:17:39,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:17:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:17:39,859 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 03:17:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:39,910 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-23 03:17:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:17:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) Word has length 8 [2021-11-23 03:17:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:39,912 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:17:39,912 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:17:39,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:17:39,922 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:39,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:17:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:17:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-11-23 03:17:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 03:17:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-23 03:17:39,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-23 03:17:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:39,935 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-23 03:17:39,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 03:17:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-23 03:17:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:17:39,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:39,936 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:39,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:40,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 03:17:40,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2021-11-23 03:17:40,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:40,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563492752] [2021-11-23 03:17:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:40,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:17:40,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:40,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563492752] [2021-11-23 03:17:40,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563492752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849606709] [2021-11-23 03:17:40,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:40,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:40,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:40,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:17:40,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:17:40,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:17:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:17:40,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:17:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849606709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1206005318] [2021-11-23 03:17:40,409 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:17:40,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:40,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:40,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:40,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,491 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:17:40,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:17:40,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,553 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:17:40,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:17:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:17:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:40,703 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:17:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 03:17:40,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:17:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,899 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 20 treesize of output 20 [2021-11-23 03:17:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:40,992 INFO L354 Elim1Store]: treesize reduction 118, result has 31.8 percent of original size [2021-11-23 03:17:40,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2021-11-23 03:17:41,078 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:17:41,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:17:41,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:41,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:41,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:41,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 03:17:41,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437129778] [2021-11-23 03:17:41,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:17:41,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:17:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:17:41,233 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 03:17:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:41,295 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-23 03:17:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:17:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) Word has length 12 [2021-11-23 03:17:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:41,297 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:17:41,297 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:17:41,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:17:41,299 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:41,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:17:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:17:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2021-11-23 03:17:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-23 03:17:41,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-11-23 03:17:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:41,305 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-23 03:17:41,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 03:17:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-23 03:17:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:17:41,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:41,306 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:41,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:41,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:41,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2021-11-23 03:17:41,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:41,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845703400] [2021-11-23 03:17:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:41,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:17:41,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845703400] [2021-11-23 03:17:41,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845703400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898977288] [2021-11-23 03:17:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:41,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:41,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:41,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:17:41,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:41,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:17:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:17:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:17:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898977288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549516339] [2021-11-23 03:17:41,892 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:17:41,892 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:41,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:41,892 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:41,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:41,948 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:17:41,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:17:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:41,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:17:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:42,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:17:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:42,092 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:17:42,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 03:17:42,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:17:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:42,213 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 25 treesize of output 25 [2021-11-23 03:17:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:42,282 INFO L354 Elim1Store]: treesize reduction 125, result has 25.1 percent of original size [2021-11-23 03:17:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2021-11-23 03:17:42,333 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:17:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:17:42,352 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:42,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '554#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:42,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:42,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:42,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-11-23 03:17:42,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475662655] [2021-11-23 03:17:42,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:42,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:17:42,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:17:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:17:42,492 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 03:17:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:42,682 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2021-11-23 03:17:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:17:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:17:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:42,685 INFO L225 Difference]: With dead ends: 100 [2021-11-23 03:17:42,685 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:17:42,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:17:42,687 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:42,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:17:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:17:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2021-11-23 03:17:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 03:17:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 03:17:42,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2021-11-23 03:17:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:42,702 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 03:17:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 03:17:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 03:17:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:17:42,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:42,703 INFO L514 BasicCegarLoop]: trace histogram [18, 11, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:42,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:42,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 878194042, now seen corresponding path program 4 times [2021-11-23 03:17:42,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292546789] [2021-11-23 03:17:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:42,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 03:17:43,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292546789] [2021-11-23 03:17:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292546789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834946932] [2021-11-23 03:17:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:43,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:43,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:43,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:43,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:17:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:17:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 03:17:43,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 03:17:43,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834946932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142152142] [2021-11-23 03:17:43,816 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:17:43,816 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:43,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:43,816 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:43,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:43,868 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:17:43,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:17:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:43,922 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:17:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:17:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:17:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,043 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:17:44,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 03:17:44,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:17:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,123 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 20 treesize of output 20 [2021-11-23 03:17:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:44,201 INFO L354 Elim1Store]: treesize reduction 118, result has 31.8 percent of original size [2021-11-23 03:17:44,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2021-11-23 03:17:44,278 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:17:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:17:44,303 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:44,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:44,437 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:44,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 44 [2021-11-23 03:17:44,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23007792] [2021-11-23 03:17:44,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:44,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 03:17:44,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 03:17:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:17:44,441 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 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 03:17:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:44,777 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2021-11-23 03:17:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 03:17:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 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 35 [2021-11-23 03:17:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:44,779 INFO L225 Difference]: With dead ends: 194 [2021-11-23 03:17:44,779 INFO L226 Difference]: Without dead ends: 177 [2021-11-23 03:17:44,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:17:44,782 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 292 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:44,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 99 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:17:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-23 03:17:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 71. [2021-11-23 03:17:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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 03:17:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-23 03:17:44,792 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 35 [2021-11-23 03:17:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-23 03:17:44,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 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 03:17:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-23 03:17:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 03:17:44,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:44,796 INFO L514 BasicCegarLoop]: trace histogram [41, 22, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:44,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:17:45,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:45,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -938265679, now seen corresponding path program 5 times [2021-11-23 03:17:45,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:45,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997719475] [2021-11-23 03:17:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:45,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-23 03:17:45,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997719475] [2021-11-23 03:17:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997719475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72129859] [2021-11-23 03:17:45,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:45,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:45,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:45,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:18:16,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 03:18:16,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:18:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-23 03:18:16,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-23 03:18:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72129859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181822332] [2021-11-23 03:18:17,197 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:18:17,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:18:17,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:18:17,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:18:17,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:18:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,266 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:18:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:18:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:18:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:18:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,383 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:18:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 03:18:17,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:18:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,458 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 20 treesize of output 20 [2021-11-23 03:18:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:17,546 INFO L354 Elim1Store]: treesize reduction 118, result has 31.8 percent of original size [2021-11-23 03:18:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2021-11-23 03:18:17,666 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:18:17,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:18:17,706 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:18:17,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:18:17,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:18:17,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:17,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-23 03:18:17,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027654490] [2021-11-23 03:18:17,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:17,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:18:17,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:18:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 03:18:17,855 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 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 03:18:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:18,518 INFO L93 Difference]: Finished difference Result 354 states and 386 transitions. [2021-11-23 03:18:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 03:18:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 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) Word has length 69 [2021-11-23 03:18:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:18,521 INFO L225 Difference]: With dead ends: 354 [2021-11-23 03:18:18,522 INFO L226 Difference]: Without dead ends: 326 [2021-11-23 03:18:18,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 03:18:18,525 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 600 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:18,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 138 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:18:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-23 03:18:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2021-11-23 03:18:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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 03:18:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-11-23 03:18:18,540 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 69 [2021-11-23 03:18:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:18,541 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-11-23 03:18:18,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 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 03:18:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-11-23 03:18:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 03:18:18,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:18,546 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:18,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:18,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:18,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:18:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 788832814, now seen corresponding path program 6 times [2021-11-23 03:18:18,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270205639] [2021-11-23 03:18:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:18,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-23 03:18:20,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270205639] [2021-11-23 03:18:20,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270205639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132536915] [2021-11-23 03:18:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:20,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:20,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:18:20,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:20,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 03:18:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-23 03:18:20,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-23 03:18:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132536915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531841470] [2021-11-23 03:18:23,501 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:18:23,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:18:23,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:18:23,501 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:18:23,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:18:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,564 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:18:23,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:18:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,628 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:18:23,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:18:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:18:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,739 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:18:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 258 [2021-11-23 03:18:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:18:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,841 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 17 treesize of output 17 [2021-11-23 03:18:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:23,916 INFO L354 Elim1Store]: treesize reduction 110, result has 30.8 percent of original size [2021-11-23 03:18:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2021-11-23 03:18:24,013 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:18:24,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:18:24,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:18:24,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3343#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:18:24,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:18:24,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:24,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 121 [2021-11-23 03:18:24,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577763715] [2021-11-23 03:18:24,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:24,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-23 03:18:24,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:24,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-23 03:18:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2021-11-23 03:18:24,230 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 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 03:18:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:26,646 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2021-11-23 03:18:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-23 03:18:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 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 98 [2021-11-23 03:18:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:26,650 INFO L225 Difference]: With dead ends: 600 [2021-11-23 03:18:26,650 INFO L226 Difference]: Without dead ends: 548 [2021-11-23 03:18:26,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5769 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2021-11-23 03:18:26,656 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1284 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:26,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 285 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:18:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-23 03:18:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 197. [2021-11-23 03:18:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 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 03:18:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2021-11-23 03:18:26,677 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 98 [2021-11-23 03:18:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:26,678 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2021-11-23 03:18:26,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 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 03:18:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2021-11-23 03:18:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 03:18:26,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:26,683 INFO L514 BasicCegarLoop]: trace histogram [118, 71, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:26,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:26,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:18:26,888 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:18:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash 441992634, now seen corresponding path program 7 times [2021-11-23 03:18:26,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:26,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460253633] [2021-11-23 03:18:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:26,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2021-11-23 03:18:29,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460253633] [2021-11-23 03:18:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460253633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615194991] [2021-11-23 03:18:29,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:29,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:29,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:29,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:18:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:29,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-23 03:18:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2021-11-23 03:18:31,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2021-11-23 03:18:41,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615194991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:41,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118650546] [2021-11-23 03:18:41,741 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:18:41,741 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:18:41,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:18:41,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:18:41,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:18:41,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,806 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:18:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:18:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:18:41,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:18:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:18:41,932 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:18:41,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-11-23 03:18:42,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:18:42,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:42,069 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 03:18:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:42,140 INFO L354 Elim1Store]: treesize reduction 131, result has 21.6 percent of original size [2021-11-23 03:18:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 102 [2021-11-23 03:18:42,179 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-23 03:18:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:18:42,201 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:18:42,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6066#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:18:42,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:18:42,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:42,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 120, 120] total 254 [2021-11-23 03:18:42,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510435271] [2021-11-23 03:18:42,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2021-11-23 03:18:42,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2021-11-23 03:18:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2021-11-23 03:18:42,381 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 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 03:19:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:02,830 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2021-11-23 03:19:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2021-11-23 03:19:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 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 03:19:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:02,845 INFO L225 Difference]: With dead ends: 1124 [2021-11-23 03:19:02,845 INFO L226 Difference]: Without dead ends: 1047 [2021-11-23 03:19:02,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25651 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2021-11-23 03:19:02,855 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2832 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 1692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1692 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:02,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2832 Valid, 573 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1692 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:19:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-23 03:19:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 391. [2021-11-23 03:19:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 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 03:19:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2021-11-23 03:19:02,895 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 195 [2021-11-23 03:19:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:02,896 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2021-11-23 03:19:02,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 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 03:19:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2021-11-23 03:19:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-23 03:19:02,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:02,913 INFO L514 BasicCegarLoop]: trace histogram [251, 132, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:02,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:19:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:19:03,128 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 564943249, now seen corresponding path program 8 times [2021-11-23 03:19:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106898005] [2021-11-23 03:19:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:03,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 40404 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2021-11-23 03:19:10,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106898005] [2021-11-23 03:19:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106898005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:19:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902014452] [2021-11-23 03:19:10,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:19:10,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:19:10,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:19:10,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:19:10,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319a23fc-fa26-4c42-81ca-61c9d376cd8e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process