./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh --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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:00:08,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:00:08,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:00:08,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:00:08,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:00:08,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:00:08,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:00:08,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:00:08,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:00:08,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:00:08,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:00:08,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:00:08,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:00:08,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:00:08,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:00:08,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:00:08,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:00:08,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:00:08,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:00:08,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:00:08,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:00:08,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:00:08,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:00:08,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:00:08,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:00:08,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:00:08,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:00:08,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:00:08,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:00:08,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:00:08,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:00:08,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:00:08,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:00:08,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:00:08,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:00:08,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:00:08,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:00:08,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:00:08,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:00:08,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:00:08,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:00:08,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:00:08,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:00:08,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:00:08,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:00:08,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:00:08,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:00:08,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:00:08,443 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:00:08,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:00:08,443 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:00:08,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:00:08,443 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:00:08,444 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:00:08,444 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:00:08,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:00:08,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:00:08,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:00:08,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:00:08,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:00:08,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2022-12-14 13:00:08,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:00:08,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:00:08,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:00:08,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:00:08,650 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:00:08,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-12-14 13:00:11,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:00:11,430 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:00:11,430 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-12-14 13:00:11,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/data/c9663e037/ca3e36e182464723a29dc2a575cf75de/FLAG05b2b029a [2022-12-14 13:00:11,446 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/data/c9663e037/ca3e36e182464723a29dc2a575cf75de [2022-12-14 13:00:11,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:00:11,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:00:11,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:00:11,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:00:11,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:00:11,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f969da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11, skipping insertion in model container [2022-12-14 13:00:11,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:00:11,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:00:11,581 WARN L237 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_9fa9127b-ef49-487e-9026-ba53f6534329/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2022-12-14 13:00:11,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:00:11,599 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:00:11,608 WARN L237 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_9fa9127b-ef49-487e-9026-ba53f6534329/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2022-12-14 13:00:11,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:00:11,621 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:00:11,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11 WrapperNode [2022-12-14 13:00:11,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:00:11,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:00:11,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:00:11,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:00:11,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,644 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-12-14 13:00:11,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:00:11,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:00:11,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:00:11,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:00:11,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,659 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:00:11,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:00:11,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:00:11,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:00:11,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (1/1) ... [2022-12-14 13:00:11,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:00:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:11,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:00:11,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:00:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:00:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:00:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:00:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:00:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:00:11,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:00:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:00:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:00:11,782 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:00:11,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:00:11,880 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:00:11,904 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:00:11,904 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:00:11,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:00:11 BoogieIcfgContainer [2022-12-14 13:00:11,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:00:11,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:00:11,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:00:11,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:00:11,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:00:11" (1/3) ... [2022-12-14 13:00:11,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6192f968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:00:11, skipping insertion in model container [2022-12-14 13:00:11,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:11" (2/3) ... [2022-12-14 13:00:11,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6192f968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:00:11, skipping insertion in model container [2022-12-14 13:00:11,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:00:11" (3/3) ... [2022-12-14 13:00:11,913 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2022-12-14 13:00:11,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:00:11,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:00:11,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:00:11,968 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@530608c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:00:11,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:00:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:00:11,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:11,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:00:11,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1868223123, now seen corresponding path program 1 times [2022-12-14 13:00:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987248903] [2022-12-14 13:00:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:12,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:12,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987248903] [2022-12-14 13:00:12,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987248903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:12,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:00:12,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:00:12,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956233637] [2022-12-14 13:00:12,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:12,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:00:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:00:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:00:12,177 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 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) [2022-12-14 13:00:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:12,212 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-12-14 13:00:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:00:12,214 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 [2022-12-14 13:00:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:12,220 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:00:12,220 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 13:00:12,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:00:12,224 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:12,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 13:00:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-12-14 13:00:12,246 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) [2022-12-14 13:00:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 13:00:12,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 13:00:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:12,248 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 13:00:12,248 INFO L496 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) [2022-12-14 13:00:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 13:00:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:00:12,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:12,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:12,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:00:12,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:12,250 INFO L85 PathProgramCache]: Analyzing trace with hash 947313280, now seen corresponding path program 1 times [2022-12-14 13:00:12,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:12,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610352103] [2022-12-14 13:00:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:12,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:12,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610352103] [2022-12-14 13:00:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610352103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:12,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:00:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:00:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377876774] [2022-12-14 13:00:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:00:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:00:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:00:12,331 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2022-12-14 13:00:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:12,353 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-12-14 13:00:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:00:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2022-12-14 13:00:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:12,354 INFO L225 Difference]: With dead ends: 18 [2022-12-14 13:00:12,354 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 13:00:12,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:00:12,355 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:12,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 13:00:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 13:00:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2022-12-14 13:00:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 13:00:12,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-12-14 13:00:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:12,358 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 13:00:12,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2022-12-14 13:00:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 13:00:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:00:12,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:12,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:00:12,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 362824998, now seen corresponding path program 1 times [2022-12-14 13:00:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655202222] [2022-12-14 13:00:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:12,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655202222] [2022-12-14 13:00:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655202222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505894949] [2022-12-14 13:00:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:12,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:12,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:12,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:12,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:00:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:00:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:12,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505894949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751534056] [2022-12-14 13:00:12,580 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 13:00:12,580 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:12,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:12,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:12,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:12,677 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:12,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:12,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:12,718 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:12,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:12,758 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:00:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:12,903 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:12,904 INFO L350 Elim1Store]: Elim1 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 251 treesize of output 247 [2022-12-14 13:00:12,981 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:12,994 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:13,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:13,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_~i~0#1|) (+ |ULTIMATE.start_main_~j~0#1| 1)) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~i~0#1| (+ |ULTIMATE.start_main_~j~0#1| 1)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:00:13,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:13,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:13,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-12-14 13:00:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133983791] [2022-12-14 13:00:13,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:00:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:00:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:00:13,870 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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) [2022-12-14 13:00:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:13,921 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-12-14 13:00:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:00:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 [2022-12-14 13:00:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:13,922 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:00:13,922 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 13:00:13,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:00:13,924 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:13,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 13:00:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2022-12-14 13:00:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-12-14 13:00:13,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-12-14 13:00:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:13,928 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-12-14 13:00:13,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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) [2022-12-14 13:00:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-12-14 13:00:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:00:13,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:13,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:13,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:14,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:14,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1925995406, now seen corresponding path program 1 times [2022-12-14 13:00:14,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:14,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466463897] [2022-12-14 13:00:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:14,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466463897] [2022-12-14 13:00:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466463897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665158705] [2022-12-14 13:00:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:14,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:14,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:00:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:00:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:14,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:00:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:14,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:14,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 13:00:14,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 13:00:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665158705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417111517] [2022-12-14 13:00:14,678 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 13:00:14,678 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:14,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:14,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:14,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,713 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:14,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,752 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:00:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,811 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:14,811 INFO L350 Elim1Store]: Elim1 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 251 treesize of output 247 [2022-12-14 13:00:14,872 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:14,895 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:14,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:15,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '303#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:15,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:15,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:15,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 13:00:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493079643] [2022-12-14 13:00:15,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:00:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:00:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:00:15,296 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-12-14 13:00:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:15,386 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-12-14 13:00:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:00:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:00:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:15,386 INFO L225 Difference]: With dead ends: 29 [2022-12-14 13:00:15,386 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 13:00:15,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:00:15,387 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:15,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 13:00:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-12-14 13:00:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2022-12-14 13:00:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 13:00:15,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-12-14 13:00:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:15,391 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 13:00:15,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-12-14 13:00:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 13:00:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:00:15,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:15,392 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:15,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:00:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1306013557, now seen corresponding path program 2 times [2022-12-14 13:00:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394148659] [2022-12-14 13:00:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:15,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394148659] [2022-12-14 13:00:15,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394148659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010156712] [2022-12-14 13:00:15,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:15,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:15,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:15,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:00:15,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:00:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:00:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:15,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:15,927 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:00:15,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:00:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:15,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:16,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:00:16,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:00:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010156712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312324440] [2022-12-14 13:00:16,139 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 13:00:16,139 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:16,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:16,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:16,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,168 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:16,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,199 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:16,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,233 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:00:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:16,306 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:00:16,307 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:00:16,351 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:16,366 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:16,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:16,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:16,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:16,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:16,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-14 13:00:16,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833189041] [2022-12-14 13:00:16,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:16,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:00:16,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:00:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:00:16,760 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-12-14 13:00:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:16,930 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-12-14 13:00:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:00:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 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 13 [2022-12-14 13:00:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:16,931 INFO L225 Difference]: With dead ends: 25 [2022-12-14 13:00:16,931 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 13:00:16,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:00:16,933 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:16,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 13:00:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-12-14 13:00:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 13:00:16,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-12-14 13:00:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:16,937 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 13:00:16,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-12-14 13:00:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 13:00:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:00:16,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:16,938 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:16,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:00:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:17,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 866185829, now seen corresponding path program 1 times [2022-12-14 13:00:17,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:17,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900695462] [2022-12-14 13:00:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:17,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900695462] [2022-12-14 13:00:17,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900695462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108999795] [2022-12-14 13:00:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:17,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:17,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:00:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:00:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:17,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:17,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108999795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:17,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586458516] [2022-12-14 13:00:17,319 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:17,319 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:17,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:17,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:17,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:17,345 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:17,373 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:17,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:17,397 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:00:17,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:17,465 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:17,465 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:00:17,513 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:17,615 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:17,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:18,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '641#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:18,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:18,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:18,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-12-14 13:00:18,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231125480] [2022-12-14 13:00:18,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:18,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:00:18,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:00:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:00:18,026 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-12-14 13:00:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:18,049 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 13:00:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:00:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 14 [2022-12-14 13:00:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:18,049 INFO L225 Difference]: With dead ends: 28 [2022-12-14 13:00:18,050 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 13:00:18,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:00:18,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 13:00:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 13:00:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-12-14 13:00:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 13:00:18,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-12-14 13:00:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:18,054 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 13:00:18,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-12-14 13:00:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 13:00:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:00:18,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:18,054 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:18,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:00:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:00:18,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -653704930, now seen corresponding path program 2 times [2022-12-14 13:00:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658316110] [2022-12-14 13:00:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:18,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:18,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658316110] [2022-12-14 13:00:18,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658316110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:18,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542817177] [2022-12-14 13:00:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:18,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:18,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:18,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:00:18,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:00:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:00:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:18,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:18,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:00:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:18,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:18,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:00:18,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:00:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:18,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542817177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903030005] [2022-12-14 13:00:18,722 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:18,722 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:18,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:18,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:18,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,746 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:18,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,769 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:18,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,791 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:00:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,838 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:18,838 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:00:18,878 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:18,988 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:18,994 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:19,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:19,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:19,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:19,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-14 13:00:19,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035528988] [2022-12-14 13:00:19,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:19,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 13:00:19,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:19,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 13:00:19,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:00:19,471 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 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) [2022-12-14 13:00:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:19,798 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-12-14 13:00:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:00:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 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 16 [2022-12-14 13:00:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:19,799 INFO L225 Difference]: With dead ends: 37 [2022-12-14 13:00:19,799 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 13:00:19,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:00:19,800 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:19,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 90 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 13:00:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-12-14 13:00:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 13:00:19,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2022-12-14 13:00:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:19,806 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 13:00:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 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) [2022-12-14 13:00:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 13:00:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:00:19,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:19,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:19,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:00:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:20,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash -802073534, now seen corresponding path program 1 times [2022-12-14 13:00:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:20,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896370779] [2022-12-14 13:00:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:20,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896370779] [2022-12-14 13:00:20,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896370779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895898361] [2022-12-14 13:00:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:20,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:20,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:20,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:00:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:00:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:20,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895898361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:20,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038659770] [2022-12-14 13:00:20,234 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:20,234 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:20,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:20,235 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:20,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:20,262 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:20,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:20,289 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:20,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:20,312 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:00:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:20,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:20,380 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:00:20,380 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:00:20,466 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:20,475 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:20,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:20,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 99999 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:20,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:20,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:20,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-14 13:00:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631186496] [2022-12-14 13:00:20,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:00:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:00:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:00:20,987 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-12-14 13:00:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:21,055 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-12-14 13:00:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:00:21,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 17 [2022-12-14 13:00:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:21,056 INFO L225 Difference]: With dead ends: 100 [2022-12-14 13:00:21,056 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 13:00:21,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:00:21,057 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 138 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:21,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 58 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 13:00:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 37. [2022-12-14 13:00:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-12-14 13:00:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 13:00:21,063 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-12-14 13:00:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:21,063 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 13:00:21,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-12-14 13:00:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 13:00:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:00:21,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:21,064 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:21,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:00:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:21,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -979843689, now seen corresponding path program 3 times [2022-12-14 13:00:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:21,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735751654] [2022-12-14 13:00:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:21,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:21,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735751654] [2022-12-14 13:00:21,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735751654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109462230] [2022-12-14 13:00:21,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:00:21,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:21,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:21,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:21,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:00:21,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:00:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:21,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:00:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:21,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:21,615 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 13:00:21,615 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:00:21,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:00:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:21,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:00:21,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:00:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:21,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109462230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085870900] [2022-12-14 13:00:21,871 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:21,871 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:21,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:21,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:21,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:21,901 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:21,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:21,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:21,940 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:00:22,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:22,038 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:00:22,038 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:00:22,126 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:22,244 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:22,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:22,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:22,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:22,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:22,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-14 13:00:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44274366] [2022-12-14 13:00:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:00:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:00:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:00:22,882 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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) [2022-12-14 13:00:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:23,089 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-12-14 13:00:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:00:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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 [2022-12-14 13:00:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:23,090 INFO L225 Difference]: With dead ends: 46 [2022-12-14 13:00:23,090 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:00:23,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:00:23,091 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:23,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:00:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-12-14 13:00:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-12-14 13:00:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 13:00:23,099 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 18 [2022-12-14 13:00:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:23,099 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 13:00:23,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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) [2022-12-14 13:00:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 13:00:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:00:23,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:23,100 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:00:23,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:00:23,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:23,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1920442436, now seen corresponding path program 4 times [2022-12-14 13:00:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221865247] [2022-12-14 13:00:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:23,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221865247] [2022-12-14 13:00:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221865247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757893748] [2022-12-14 13:00:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:00:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:23,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:23,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:00:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:23,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:00:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:00:23,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:23,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:00:23,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:00:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:23,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:24,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:00:24,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:00:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:24,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757893748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:24,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241012466] [2022-12-14 13:00:24,103 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:24,103 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:24,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:24,104 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:24,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:24,131 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:24,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:24,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:24,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:24,158 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:00:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:24,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:24,207 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:24,207 INFO L350 Elim1Store]: Elim1 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 251 treesize of output 247 [2022-12-14 13:00:24,245 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:24,348 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:24,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:24,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1646#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:24,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:24,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:24,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-12-14 13:00:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312785350] [2022-12-14 13:00:24,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:00:24,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:00:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:00:24,863 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2022-12-14 13:00:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:25,179 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-14 13:00:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:00:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 21 [2022-12-14 13:00:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:25,180 INFO L225 Difference]: With dead ends: 60 [2022-12-14 13:00:25,180 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 13:00:25,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:00:25,180 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:25,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 114 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 13:00:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-12-14 13:00:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 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) [2022-12-14 13:00:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-12-14 13:00:25,187 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 21 [2022-12-14 13:00:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:25,187 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-12-14 13:00:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2022-12-14 13:00:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-12-14 13:00:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:00:25,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:25,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 13:00:25,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:00:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:00:25,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1801662018, now seen corresponding path program 5 times [2022-12-14 13:00:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:25,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116498988] [2022-12-14 13:00:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:25,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116498988] [2022-12-14 13:00:25,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116498988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297866770] [2022-12-14 13:00:25,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:25,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:25,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:00:25,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:00:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:25,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:00:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:25,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:25,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297866770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:25,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648584748] [2022-12-14 13:00:25,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:25,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:25,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:25,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:25,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:25,670 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:25,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:25,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:25,698 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:00:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:25,749 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:25,749 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:00:25,788 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:25,902 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:25,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:26,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1945#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:26,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:26,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:26,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-14 13:00:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15589270] [2022-12-14 13:00:26,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:00:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:00:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:00:26,347 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:26,384 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-12-14 13:00:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:00:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 13:00:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:26,384 INFO L225 Difference]: With dead ends: 47 [2022-12-14 13:00:26,384 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 13:00:26,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:00:26,385 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:26,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 13:00:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 13:00:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-12-14 13:00:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 13:00:26,389 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2022-12-14 13:00:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 13:00:26,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 13:00:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:00:26,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:26,390 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:00:26,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:00:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:26,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 814071523, now seen corresponding path program 6 times [2022-12-14 13:00:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210585266] [2022-12-14 13:00:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:26,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210585266] [2022-12-14 13:00:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210585266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382552591] [2022-12-14 13:00:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:00:26,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:26,869 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:26,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:00:26,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:00:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 13:00:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:26,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:26,988 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 13:00:27,029 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-14 13:00:27,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-12-14 13:00:27,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:00:27,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-12-14 13:00:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:27,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:27,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-12-14 13:00:27,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:00:27,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 687 treesize of output 667 [2022-12-14 13:00:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:27,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382552591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:27,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048832184] [2022-12-14 13:00:27,718 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:27,718 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:27,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:27,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:27,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:27,740 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:00:27,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:00:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:27,761 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:27,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:27,782 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:00:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:27,828 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:27,828 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:00:27,861 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:27,955 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:27,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:28,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2228#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:28,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:28,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:28,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-12-14 13:00:28,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399150819] [2022-12-14 13:00:28,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:28,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:00:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:00:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:00:28,486 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2022-12-14 13:00:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:29,047 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 13:00:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:00:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 23 [2022-12-14 13:00:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:29,048 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:00:29,048 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:00:29,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:00:29,050 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 103 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:29,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 76 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:00:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:00:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-12-14 13:00:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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) [2022-12-14 13:00:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 13:00:29,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 23 [2022-12-14 13:00:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:29,057 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 13:00:29,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2022-12-14 13:00:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 13:00:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:00:29,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:29,058 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 13:00:29,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:00:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:29,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1670425872, now seen corresponding path program 7 times [2022-12-14 13:00:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:29,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178496808] [2022-12-14 13:00:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:29,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178496808] [2022-12-14 13:00:29,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178496808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:29,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841520563] [2022-12-14 13:00:29,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:00:29,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:29,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:29,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:00:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 13:00:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:29,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:00:29,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:00:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:29,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:00:29,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:00:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:29,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841520563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54737278] [2022-12-14 13:00:29,996 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:29,997 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:29,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:29,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:29,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:30,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:30,017 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:30,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:30,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:30,039 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:00:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:30,090 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:00:30,091 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:00:30,130 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:30,207 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:30,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:30,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2548#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:30,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:30,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:30,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-12-14 13:00:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858235679] [2022-12-14 13:00:30,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:30,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:00:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:00:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 13:00:30,817 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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) [2022-12-14 13:00:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:31,350 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-12-14 13:00:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:00:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 26 [2022-12-14 13:00:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:31,351 INFO L225 Difference]: With dead ends: 54 [2022-12-14 13:00:31,351 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:00:31,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:00:31,352 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:31,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:00:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:00:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:00:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-14 13:00:31,357 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2022-12-14 13:00:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-14 13:00:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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) [2022-12-14 13:00:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-14 13:00:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:00:31,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:31,358 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 13:00:31,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:31,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:00:31,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1367190487, now seen corresponding path program 8 times [2022-12-14 13:00:31,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:31,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977456464] [2022-12-14 13:00:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:31,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:31,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977456464] [2022-12-14 13:00:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977456464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141412682] [2022-12-14 13:00:31,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:31,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:31,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:31,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:00:31,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:00:31,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:00:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:31,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:00:32,001 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:00:32,001 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:00:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:00:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:32,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:32,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:00:32,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:00:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:32,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141412682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:32,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178450300] [2022-12-14 13:00:32,434 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:32,434 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:32,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:32,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:32,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:32,459 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:00:32,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:00:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:32,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:00:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:32,484 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:00:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:32,532 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:00:32,532 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:00:32,577 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:32,671 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:00:32,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:33,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:00:33,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:33,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:33,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-12-14 13:00:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933316964] [2022-12-14 13:00:33,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:33,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 13:00:33,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 13:00:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:00:33,233 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2022-12-14 13:00:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:33,666 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-12-14 13:00:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:00:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 28 [2022-12-14 13:00:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:33,667 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:00:33,667 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:00:33,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2286, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:00:33,669 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:33,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 97 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:00:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:00:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-12-14 13:00:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 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) [2022-12-14 13:00:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-12-14 13:00:33,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2022-12-14 13:00:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:33,678 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-12-14 13:00:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2022-12-14 13:00:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-12-14 13:00:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:00:33,679 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:33,679 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 13:00:33,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:00:33,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:00:33,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -791777302, now seen corresponding path program 9 times [2022-12-14 13:00:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:33,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82459485] [2022-12-14 13:00:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:34,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82459485] [2022-12-14 13:00:34,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82459485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635092334] [2022-12-14 13:00:34,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:00:34,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:34,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:34,206 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:34,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:00:34,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:00:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 13:00:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:34,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:00:34,341 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 13:00:34,341 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 37 [2022-12-14 13:00:34,401 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 13:00:34,402 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 52 [2022-12-14 13:00:34,490 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 13:00:34,490 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 54 [2022-12-14 13:00:34,567 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 13:00:34,567 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 54 [2022-12-14 13:00:35,378 INFO L321 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2022-12-14 13:00:35,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 41 [2022-12-14 13:00:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:35,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:59,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2022-12-14 13:00:59,842 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 13:00:59,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8355 treesize of output 8283 [2022-12-14 13:01:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:06,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635092334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:06,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679926007] [2022-12-14 13:01:06,888 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:06,888 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:06,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:06,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:06,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:06,915 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:06,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:06,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:06,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:06,948 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:06,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:07,005 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:07,006 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:01:07,060 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:07,155 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:07,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:07,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3265#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:07,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:07,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:07,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-12-14 13:01:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629523777] [2022-12-14 13:01:07,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 13:01:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 13:01:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2027, Unknown=10, NotChecked=0, Total=2352 [2022-12-14 13:01:07,976 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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) [2022-12-14 13:01:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:12,158 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-12-14 13:01:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 13:01:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 31 [2022-12-14 13:01:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:12,159 INFO L225 Difference]: With dead ends: 74 [2022-12-14 13:01:12,159 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 13:01:12,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=953, Invalid=5357, Unknown=10, NotChecked=0, Total=6320 [2022-12-14 13:01:12,163 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:12,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 83 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:01:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 13:01:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 13:01:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2022-12-14 13:01:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-12-14 13:01:12,169 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2022-12-14 13:01:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:12,169 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-12-14 13:01:12,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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) [2022-12-14 13:01:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-12-14 13:01:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 13:01:12,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:12,170 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 13:01:12,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:12,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:12,371 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash 764749560, now seen corresponding path program 10 times [2022-12-14 13:01:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:12,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43436238] [2022-12-14 13:01:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:12,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43436238] [2022-12-14 13:01:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43436238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481318115] [2022-12-14 13:01:12,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:01:12,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:12,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:12,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:12,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:01:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 13:01:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:13,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:01:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,049 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:01:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,086 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:01:13,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:01:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:13,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:13,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:01:13,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 290 [2022-12-14 13:01:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:13,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481318115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197753325] [2022-12-14 13:01:13,875 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:13,875 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:13,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:13,875 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:13,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,908 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:13,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:13,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,935 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:13,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:13,992 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:13,993 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:01:14,068 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:14,166 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:14,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:15,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3740#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:15,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:15,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-12-14 13:01:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192254285] [2022-12-14 13:01:15,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 13:01:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 13:01:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2562, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:01:15,025 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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) [2022-12-14 13:01:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:15,653 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-12-14 13:01:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:01:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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) Word has length 35 [2022-12-14 13:01:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:15,653 INFO L225 Difference]: With dead ends: 46 [2022-12-14 13:01:15,653 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:01:15,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=384, Invalid=3906, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 13:01:15,656 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:15,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:01:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:01:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-14 13:01:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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) [2022-12-14 13:01:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-12-14 13:01:15,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-12-14 13:01:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:15,665 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-12-14 13:01:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 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) [2022-12-14 13:01:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-12-14 13:01:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 13:01:15,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:15,665 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 5, 5, 1, 1, 1, 1, 1] [2022-12-14 13:01:15,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:01:15,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:01:15,866 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2142210373, now seen corresponding path program 11 times [2022-12-14 13:01:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:15,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800592719] [2022-12-14 13:01:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:16,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800592719] [2022-12-14 13:01:16,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800592719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:16,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200401655] [2022-12-14 13:01:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:16,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:16,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:16,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:01:16,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 13:01:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:16,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 13:01:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:16,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:16,522 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:01:16,522 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:01:16,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:01:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:16,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:16,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:01:16,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:01:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:17,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200401655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308863389] [2022-12-14 13:01:17,184 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:17,185 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:17,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:17,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:17,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:17,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:17,209 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:17,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:17,236 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:17,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:17,254 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:01:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:17,313 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:01:17,313 INFO L350 Elim1Store]: Elim1 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 263 treesize of output 269 [2022-12-14 13:01:17,361 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:17,449 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:17,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:18,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4161#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:18,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:18,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:18,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2022-12-14 13:01:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831867596] [2022-12-14 13:01:18,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:18,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 13:01:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 13:01:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:01:18,211 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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) [2022-12-14 13:01:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:19,171 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-12-14 13:01:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 13:01:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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 38 [2022-12-14 13:01:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:19,171 INFO L225 Difference]: With dead ends: 49 [2022-12-14 13:01:19,171 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 13:01:19,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=371, Invalid=4051, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 13:01:19,172 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:19,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:01:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 13:01:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 13:01:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:01:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-12-14 13:01:19,181 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-12-14 13:01:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:19,181 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-12-14 13:01:19,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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) [2022-12-14 13:01:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-12-14 13:01:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:01:19,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:19,182 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 6, 1, 1, 1, 1, 1] [2022-12-14 13:01:19,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:01:19,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:01:19,384 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash 334982168, now seen corresponding path program 12 times [2022-12-14 13:01:19,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:19,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689632697] [2022-12-14 13:01:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:19,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689632697] [2022-12-14 13:01:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689632697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664711256] [2022-12-14 13:01:19,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:01:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:19,879 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:19,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:01:19,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:01:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 13:01:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:20,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:20,445 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-14 13:01:20,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-14 13:01:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 46 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:21,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-12-14 13:01:21,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-14 13:01:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:21,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664711256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574276354] [2022-12-14 13:01:21,367 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:21,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:21,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:21,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:21,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,392 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:21,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,420 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:21,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,436 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:21,494 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:21,494 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:01:21,556 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:21,630 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:21,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:22,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4621#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:22,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:22,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:22,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2022-12-14 13:01:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819644228] [2022-12-14 13:01:22,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 13:01:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 13:01:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2660, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 13:01:22,489 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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) [2022-12-14 13:01:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:23,610 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-12-14 13:01:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:01:23,610 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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 41 [2022-12-14 13:01:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:23,610 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:01:23,610 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:01:23,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=587, Invalid=4383, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 13:01:23,612 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:23,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 71 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:01:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:01:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-14 13:01:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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) [2022-12-14 13:01:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-12-14 13:01:23,621 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-12-14 13:01:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:23,622 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-12-14 13:01:23,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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) [2022-12-14 13:01:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-12-14 13:01:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 13:01:23,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:23,623 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 7, 6, 6, 1, 1, 1, 1, 1] [2022-12-14 13:01:23,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:01:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:01:23,824 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:23,825 INFO L85 PathProgramCache]: Analyzing trace with hash 81572287, now seen corresponding path program 13 times [2022-12-14 13:01:23,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:23,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024577160] [2022-12-14 13:01:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:23,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:24,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024577160] [2022-12-14 13:01:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024577160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615408617] [2022-12-14 13:01:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:01:24,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:24,376 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:01:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 13:01:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:24,538 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 14 [2022-12-14 13:01:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:24,607 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 29 [2022-12-14 13:01:24,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:01:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:24,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:25,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:01:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:01:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:25,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615408617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746134817] [2022-12-14 13:01:25,514 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:25,514 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:25,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:25,514 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:25,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:25,543 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:25,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:25,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:25,568 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:25,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:25,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:25,624 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:25,625 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:01:25,691 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:25,767 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:25,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:26,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5116#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:26,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:26,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:26,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-12-14 13:01:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943052149] [2022-12-14 13:01:26,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:01:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:01:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2492, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:01:26,451 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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) [2022-12-14 13:01:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:27,668 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-12-14 13:01:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:01:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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 43 [2022-12-14 13:01:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:27,669 INFO L225 Difference]: With dead ends: 52 [2022-12-14 13:01:27,669 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:01:27,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:01:27,670 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:27,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 279 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:01:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:01:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-12-14 13:01:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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) [2022-12-14 13:01:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-12-14 13:01:27,680 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2022-12-14 13:01:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:27,680 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-12-14 13:01:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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) [2022-12-14 13:01:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-12-14 13:01:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 13:01:27,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:27,680 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 7, 7, 1, 1, 1, 1, 1] [2022-12-14 13:01:27,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:27,882 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash -826334572, now seen corresponding path program 14 times [2022-12-14 13:01:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:27,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447579739] [2022-12-14 13:01:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:28,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447579739] [2022-12-14 13:01:28,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447579739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853881280] [2022-12-14 13:01:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:28,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:28,387 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:28,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:01:28,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 13:01:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 13:01:28,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:28,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:29,195 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-14 13:01:29,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-14 13:01:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 70 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:29,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:29,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-12-14 13:01:29,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-14 13:01:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 57 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853881280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070564976] [2022-12-14 13:01:30,304 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:30,304 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:30,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:30,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:30,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:30,329 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:30,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:30,355 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:30,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:30,371 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:30,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:30,425 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:30,425 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:01:30,498 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:30,577 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:30,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:31,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5619#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:31,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:31,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:31,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-12-14 13:01:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971909839] [2022-12-14 13:01:31,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:01:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:01:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3175, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:01:31,411 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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) [2022-12-14 13:01:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:32,510 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-12-14 13:01:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:01:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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 46 [2022-12-14 13:01:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:32,511 INFO L225 Difference]: With dead ends: 77 [2022-12-14 13:01:32,511 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:01:32,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=677, Invalid=5329, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 13:01:32,512 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:32,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:01:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:01:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 13:01:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2022-12-14 13:01:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-12-14 13:01:32,525 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2022-12-14 13:01:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:32,525 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-12-14 13:01:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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) [2022-12-14 13:01:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-12-14 13:01:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 13:01:32,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:32,525 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2022-12-14 13:01:32,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:01:32,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:32,726 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1710553164, now seen corresponding path program 2 times [2022-12-14 13:01:32,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:32,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103364931] [2022-12-14 13:01:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 13:01:32,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103364931] [2022-12-14 13:01:32,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103364931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537220031] [2022-12-14 13:01:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:32,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:32,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:01:33,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 13:01:33,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:01:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 13:01:33,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 13:01:33,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537220031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:33,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092414019] [2022-12-14 13:01:33,313 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:33,313 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:33,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:33,314 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:33,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:33,344 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:33,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:33,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:33,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:33,370 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:01:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:33,418 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:01:33,418 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:01:33,452 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:33,460 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:33,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:34,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6146#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 99999 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:34,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:34,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:34,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-14 13:01:34,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68549661] [2022-12-14 13:01:34,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:01:34,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:34,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:01:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1147, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:01:34,113 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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) [2022-12-14 13:01:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:34,277 INFO L93 Difference]: Finished difference Result 410 states and 435 transitions. [2022-12-14 13:01:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:01:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 47 [2022-12-14 13:01:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:34,279 INFO L225 Difference]: With dead ends: 410 [2022-12-14 13:01:34,279 INFO L226 Difference]: Without dead ends: 384 [2022-12-14 13:01:34,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1147, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:01:34,280 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 192 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:34,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 104 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:01:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-14 13:01:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 72. [2022-12-14 13:01:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 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) [2022-12-14 13:01:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2022-12-14 13:01:34,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 47 [2022-12-14 13:01:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:34,296 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2022-12-14 13:01:34,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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) [2022-12-14 13:01:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2022-12-14 13:01:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 13:01:34,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:34,297 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2022-12-14 13:01:34,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:01:34,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:01:34,498 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2141827763, now seen corresponding path program 15 times [2022-12-14 13:01:34,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:34,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505556673] [2022-12-14 13:01:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:34,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:34,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:34,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505556673] [2022-12-14 13:01:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505556673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:34,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034714320] [2022-12-14 13:01:34,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:01:34,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:34,990 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:34,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:01:35,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:01:35,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:35,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 13:01:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:35,313 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:01:35,314 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:01:35,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:01:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:35,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:01:35,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:01:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034714320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750771314] [2022-12-14 13:01:36,327 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:36,327 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:36,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:36,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:36,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:36,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:36,353 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:36,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:36,378 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:36,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:36,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:36,395 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:36,450 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:36,450 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:01:36,524 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:36,618 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:36,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:37,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7136#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:37,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:37,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:37,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-12-14 13:01:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431144326] [2022-12-14 13:01:37,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:01:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:01:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3342, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:01:37,457 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 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) [2022-12-14 13:01:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:38,854 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2022-12-14 13:01:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 13:01:38,854 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 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 48 [2022-12-14 13:01:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:38,855 INFO L225 Difference]: With dead ends: 79 [2022-12-14 13:01:38,855 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:01:38,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=449, Invalid=6031, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 13:01:38,856 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:38,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 292 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:01:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:01:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-12-14 13:01:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 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) [2022-12-14 13:01:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-12-14 13:01:38,874 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 48 [2022-12-14 13:01:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:38,874 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-12-14 13:01:38,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 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) [2022-12-14 13:01:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-12-14 13:01:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 13:01:38,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:38,875 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 8, 8, 1, 1, 1, 1, 1] [2022-12-14 13:01:38,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:01:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:39,076 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1151585210, now seen corresponding path program 16 times [2022-12-14 13:01:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73390733] [2022-12-14 13:01:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:39,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:39,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73390733] [2022-12-14 13:01:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73390733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:39,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093131917] [2022-12-14 13:01:39,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:01:39,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:39,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:39,565 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:39,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:01:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 13:01:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:39,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:01:40,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:01:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:40,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:40,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:01:40,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:01:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:41,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093131917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:41,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93897710] [2022-12-14 13:01:41,056 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:41,056 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:41,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:41,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:41,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:41,083 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:41,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:41,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:41,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:41,105 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:01:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:41,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:41,153 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:01:41,154 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:01:41,193 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:41,285 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:41,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:42,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:42,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:42,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-12-14 13:01:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429370509] [2022-12-14 13:01:42,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:42,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:01:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:01:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4729, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 13:01:42,174 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 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) [2022-12-14 13:01:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:43,119 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2022-12-14 13:01:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:01:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 13:01:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:43,120 INFO L225 Difference]: With dead ends: 111 [2022-12-14 13:01:43,120 INFO L226 Difference]: Without dead ends: 109 [2022-12-14 13:01:43,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=358, Invalid=6448, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:01:43,121 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:43,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 550 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:01:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-14 13:01:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-12-14 13:01:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 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) [2022-12-14 13:01:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-14 13:01:43,151 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 51 [2022-12-14 13:01:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:43,151 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-14 13:01:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 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) [2022-12-14 13:01:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-14 13:01:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:01:43,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:43,152 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 9, 8, 8, 1, 1, 1, 1, 1] [2022-12-14 13:01:43,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:01:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:43,353 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1465898285, now seen corresponding path program 17 times [2022-12-14 13:01:43,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:43,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559693817] [2022-12-14 13:01:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:43,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:43,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559693817] [2022-12-14 13:01:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559693817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433516374] [2022-12-14 13:01:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:43,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:43,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:01:44,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 13:01:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:44,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 13:01:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:44,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:44,535 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:01:44,535 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:01:44,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:01:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:45,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:01:45,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:01:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:45,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433516374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:45,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090260471] [2022-12-14 13:01:45,594 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:45,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:45,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:45,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:45,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:45,620 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:45,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:45,642 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:45,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:45,660 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:01:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:45,713 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:01:45,713 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:01:45,752 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:45,842 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:45,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:46,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8435#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:46,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:46,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:46,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-12-14 13:01:46,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112037886] [2022-12-14 13:01:46,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:46,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 13:01:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 13:01:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3946, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:01:46,661 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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) [2022-12-14 13:01:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:48,300 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2022-12-14 13:01:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 13:01:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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 53 [2022-12-14 13:01:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:48,301 INFO L225 Difference]: With dead ends: 109 [2022-12-14 13:01:48,301 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 13:01:48,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=488, Invalid=7168, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:01:48,302 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:48,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 337 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:01:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 13:01:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2022-12-14 13:01:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 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) [2022-12-14 13:01:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-12-14 13:01:48,324 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 53 [2022-12-14 13:01:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:48,324 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-12-14 13:01:48,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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) [2022-12-14 13:01:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-12-14 13:01:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 13:01:48,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:48,324 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2022-12-14 13:01:48,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 13:01:48,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:01:48,526 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1328922285, now seen corresponding path program 18 times [2022-12-14 13:01:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851513634] [2022-12-14 13:01:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 101 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:48,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:48,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851513634] [2022-12-14 13:01:48,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851513634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:48,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432664139] [2022-12-14 13:01:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:01:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:48,787 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:48,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 13:01:49,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:01:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:01:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 126 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:49,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 126 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432664139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287830881] [2022-12-14 13:01:49,431 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:49,431 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:49,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:49,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:49,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:49,455 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:49,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:49,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:49,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:49,480 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:01:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:49,525 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:01:49,525 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:01:49,560 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:49,634 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:49,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:50,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9104#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:50,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:50,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:50,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-12-14 13:01:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187504075] [2022-12-14 13:01:50,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:01:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:01:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:01:50,254 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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) [2022-12-14 13:01:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:50,408 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2022-12-14 13:01:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:01:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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 54 [2022-12-14 13:01:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:50,409 INFO L225 Difference]: With dead ends: 112 [2022-12-14 13:01:50,409 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 13:01:50,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:01:50,410 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:50,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:01:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 13:01:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-14 13:01:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 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) [2022-12-14 13:01:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2022-12-14 13:01:50,433 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 54 [2022-12-14 13:01:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:50,433 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2022-12-14 13:01:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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) [2022-12-14 13:01:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2022-12-14 13:01:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 13:01:50,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:50,433 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 9, 9, 1, 1, 1, 1, 1] [2022-12-14 13:01:50,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:50,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:01:50,635 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -646504346, now seen corresponding path program 19 times [2022-12-14 13:01:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801025565] [2022-12-14 13:01:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:51,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801025565] [2022-12-14 13:01:51,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801025565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085059465] [2022-12-14 13:01:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:01:51,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:51,283 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:51,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 13:01:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 13:01:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:51,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:01:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:01:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:52,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:52,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:01:52,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:01:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:53,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085059465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072103698] [2022-12-14 13:01:53,106 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:53,106 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:53,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:53,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:53,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:53,137 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:01:53,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:01:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:53,168 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:53,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:53,189 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:01:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:53,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:53,257 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:01:53,257 INFO L350 Elim1Store]: Elim1 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 263 treesize of output 269 [2022-12-14 13:01:53,335 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:53,419 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:53,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:54,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9778#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:54,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:54,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:54,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-12-14 13:01:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740361132] [2022-12-14 13:01:54,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:54,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 13:01:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 13:01:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5594, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:01:54,408 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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) [2022-12-14 13:01:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:55,506 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-12-14 13:01:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 13:01:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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 56 [2022-12-14 13:01:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:55,506 INFO L225 Difference]: With dead ends: 117 [2022-12-14 13:01:55,506 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 13:01:55,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 13:01:55,507 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:55,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 641 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:01:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 13:01:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2022-12-14 13:01:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 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) [2022-12-14 13:01:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-12-14 13:01:55,532 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 56 [2022-12-14 13:01:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:55,532 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-12-14 13:01:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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) [2022-12-14 13:01:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-12-14 13:01:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 13:01:55,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:55,533 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 10, 9, 9, 1, 1, 1, 1, 1] [2022-12-14 13:01:55,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:55,734 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -655951905, now seen corresponding path program 20 times [2022-12-14 13:01:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016231093] [2022-12-14 13:01:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:56,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016231093] [2022-12-14 13:01:56,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016231093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149365797] [2022-12-14 13:01:56,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:56,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:56,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:56,353 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 13:01:56,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:01:56,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 13:01:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:56,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:01:56,782 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:01:56,783 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:01:57,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:01:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:57,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:57,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:01:57,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:01:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:58,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149365797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253805126] [2022-12-14 13:01:58,125 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:58,125 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:58,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:58,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:58,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:58,154 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:01:58,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:01:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:58,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:01:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:58,181 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:01:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:58,228 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:01:58,229 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:01:58,263 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:58,364 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:01:58,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:59,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10496#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:01:59,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:59,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:59,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-12-14 13:01:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814466666] [2022-12-14 13:01:59,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 13:01:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 13:01:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4600, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:01:59,500 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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) [2022-12-14 13:02:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:01,368 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-12-14 13:02:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 13:02:01,368 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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 58 [2022-12-14 13:02:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:01,369 INFO L225 Difference]: With dead ends: 115 [2022-12-14 13:02:01,369 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 13:02:01,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=527, Invalid=8403, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 13:02:01,369 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:01,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 385 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:02:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 13:02:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2022-12-14 13:02:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 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) [2022-12-14 13:02:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-12-14 13:02:01,397 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 58 [2022-12-14 13:02:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:01,397 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-12-14 13:02:01,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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) [2022-12-14 13:02:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-12-14 13:02:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 13:02:01,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:01,398 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:02:01,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 13:02:01,599 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1372463475, now seen corresponding path program 21 times [2022-12-14 13:02:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580978091] [2022-12-14 13:02:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 127 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:01,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:01,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580978091] [2022-12-14 13:02:01,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580978091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:01,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491990574] [2022-12-14 13:02:01,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:02:01,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:01,900 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:01,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 13:02:02,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:02:02,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:02:02,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 155 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:02,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 155 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:02,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491990574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:02,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220829898] [2022-12-14 13:02:02,605 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:02,605 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:02,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:02,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:02,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:02,626 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:02:02,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:02:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:02,646 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:02,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:02,662 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:02,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:02,716 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:02,716 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:02:02,755 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:02,833 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:02,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:03,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11214#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:03,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:03,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:03,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-12-14 13:02:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195709976] [2022-12-14 13:02:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 13:02:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 13:02:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:02:03,436 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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) [2022-12-14 13:02:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:03,595 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-12-14 13:02:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:02:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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 59 [2022-12-14 13:02:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:03,595 INFO L225 Difference]: With dead ends: 118 [2022-12-14 13:02:03,595 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 13:02:03,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 134 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:02:03,596 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:03,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 13:02:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-12-14 13:02:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 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) [2022-12-14 13:02:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-12-14 13:02:03,624 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 59 [2022-12-14 13:02:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:03,624 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-12-14 13:02:03,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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) [2022-12-14 13:02:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-12-14 13:02:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 13:02:03,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:03,624 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:02:03,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 13:02:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 13:02:03,825 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash 643147892, now seen corresponding path program 22 times [2022-12-14 13:02:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351358482] [2022-12-14 13:02:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:04,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351358482] [2022-12-14 13:02:04,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351358482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440877764] [2022-12-14 13:02:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:04,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:04,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:04,530 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:04,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:02:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:04,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 13:02:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:05,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:02:05,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:05,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:06,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:02:06,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:02:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:06,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440877764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:06,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689390311] [2022-12-14 13:02:06,690 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:06,691 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:06,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:06,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:06,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:06,720 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:06,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:06,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:06,741 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:06,797 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:06,798 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:02:06,844 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:06,923 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:06,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:07,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11936#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:07,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:07,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:07,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2022-12-14 13:02:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780229248] [2022-12-14 13:02:07,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 13:02:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:07,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 13:02:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=6527, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:02:07,906 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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) [2022-12-14 13:02:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:09,415 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2022-12-14 13:02:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:02:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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 61 [2022-12-14 13:02:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:09,416 INFO L225 Difference]: With dead ends: 123 [2022-12-14 13:02:09,416 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 13:02:09,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=421, Invalid=9085, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 13:02:09,417 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:09,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 730 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:02:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 13:02:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2022-12-14 13:02:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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) [2022-12-14 13:02:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-12-14 13:02:09,451 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 61 [2022-12-14 13:02:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:09,451 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-12-14 13:02:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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) [2022-12-14 13:02:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-12-14 13:02:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 13:02:09,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:09,452 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 11, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:02:09,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 13:02:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 13:02:09,653 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 615421083, now seen corresponding path program 23 times [2022-12-14 13:02:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94740802] [2022-12-14 13:02:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:10,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94740802] [2022-12-14 13:02:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94740802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513630984] [2022-12-14 13:02:10,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:02:10,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:10,390 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 13:02:10,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-14 13:02:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 13:02:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:11,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:02:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,200 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:02:11,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:11,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:12,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:02:12,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:02:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:12,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513630984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042674894] [2022-12-14 13:02:12,903 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:12,903 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:12,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:12,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:12,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,927 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:02:12,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:02:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,952 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:12,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:12,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,969 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:13,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,031 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:13,031 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:02:13,100 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:13,188 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:13,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:14,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12716#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:14,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:14,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:14,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2022-12-14 13:02:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2545226] [2022-12-14 13:02:14,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-14 13:02:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-14 13:02:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=7344, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:02:14,214 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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) [2022-12-14 13:02:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:16,162 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-12-14 13:02:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 13:02:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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 63 [2022-12-14 13:02:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:16,163 INFO L225 Difference]: With dead ends: 121 [2022-12-14 13:02:16,163 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 13:02:16,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=666, Invalid=12674, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 13:02:16,164 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:16,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 595 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:02:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 13:02:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-12-14 13:02:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.144578313253012) internal successors, (95), 83 states have internal predecessors, (95), 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) [2022-12-14 13:02:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-12-14 13:02:16,196 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 63 [2022-12-14 13:02:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:16,196 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-12-14 13:02:16,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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) [2022-12-14 13:02:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-12-14 13:02:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 13:02:16,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:16,197 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2022-12-14 13:02:16,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 13:02:16,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:16,398 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash 174896063, now seen corresponding path program 24 times [2022-12-14 13:02:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672839947] [2022-12-14 13:02:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 156 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:16,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:16,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672839947] [2022-12-14 13:02:16,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672839947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:16,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708068201] [2022-12-14 13:02:16,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:02:16,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:16,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:16,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 13:02:16,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:02:16,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:02:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 187 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:17,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 187 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:17,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708068201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:17,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671111252] [2022-12-14 13:02:17,532 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:17,532 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:17,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:17,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:17,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:17,565 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:17,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:17,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:17,591 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:02:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:17,641 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:02:17,641 INFO L350 Elim1Store]: Elim1 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 251 treesize of output 247 [2022-12-14 13:02:17,687 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:17,786 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:17,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:18,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13485#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:18,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:18,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-12-14 13:02:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26190103] [2022-12-14 13:02:18,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:02:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:02:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 13:02:18,596 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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) [2022-12-14 13:02:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:18,836 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2022-12-14 13:02:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 13:02:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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 64 [2022-12-14 13:02:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:18,837 INFO L225 Difference]: With dead ends: 124 [2022-12-14 13:02:18,837 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 13:02:18,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 146 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 13:02:18,838 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:18,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 13:02:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 13:02:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 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) [2022-12-14 13:02:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-12-14 13:02:18,872 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 64 [2022-12-14 13:02:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:18,872 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-12-14 13:02:18,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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) [2022-12-14 13:02:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-12-14 13:02:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 13:02:18,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:18,872 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 11, 11, 1, 1, 1, 1, 1] [2022-12-14 13:02:18,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 13:02:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 13:02:19,073 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1200750024, now seen corresponding path program 25 times [2022-12-14 13:02:19,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:19,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018616382] [2022-12-14 13:02:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:19,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018616382] [2022-12-14 13:02:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018616382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537955216] [2022-12-14 13:02:19,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:19,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:19,992 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:19,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:02:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 13:02:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:02:20,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:20,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:20,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:02:20,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:02:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:21,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537955216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:21,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124880912] [2022-12-14 13:02:21,362 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:21,363 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:21,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:21,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:21,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:21,392 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:21,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:21,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:21,416 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:02:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:21,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:21,475 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:02:21,475 INFO L350 Elim1Store]: Elim1 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 263 treesize of output 269 [2022-12-14 13:02:21,549 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:21,635 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:21,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:22,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14230#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:22,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:22,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:22,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2022-12-14 13:02:22,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052197032] [2022-12-14 13:02:22,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:02:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:22,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:02:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 13:02:22,460 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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) [2022-12-14 13:02:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:24,078 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-12-14 13:02:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:02:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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 66 [2022-12-14 13:02:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:24,079 INFO L225 Difference]: With dead ends: 129 [2022-12-14 13:02:24,079 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 13:02:24,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=309, Invalid=5853, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 13:02:24,079 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:24,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 683 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:02:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 13:02:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2022-12-14 13:02:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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) [2022-12-14 13:02:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-12-14 13:02:24,116 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 66 [2022-12-14 13:02:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:24,116 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-12-14 13:02:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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) [2022-12-14 13:02:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-12-14 13:02:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 13:02:24,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:24,117 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 12, 11, 11, 1, 1, 1, 1, 1] [2022-12-14 13:02:24,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:02:24,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 13:02:24,318 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -346712463, now seen corresponding path program 26 times [2022-12-14 13:02:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:24,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477498911] [2022-12-14 13:02:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:25,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477498911] [2022-12-14 13:02:25,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477498911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612412020] [2022-12-14 13:02:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:02:25,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:25,232 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:25,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 13:02:25,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 13:02:25,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 13:02:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:26,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:02:26,198 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 13:02:26,198 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:02:26,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:02:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:26,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:27,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:02:27,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:02:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:27,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612412020] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828685756] [2022-12-14 13:02:27,978 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:27,978 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:27,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:27,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:27,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:28,006 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:28,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:28,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:28,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:28,029 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:28,093 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:28,094 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:02:28,170 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:28,267 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:28,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:29,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15058#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:29,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:29,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:29,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 86 [2022-12-14 13:02:29,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680922585] [2022-12-14 13:02:29,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 13:02:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 13:02:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=8393, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 13:02:29,345 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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) [2022-12-14 13:02:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:32,856 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-12-14 13:02:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 13:02:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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 68 [2022-12-14 13:02:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:32,857 INFO L225 Difference]: With dead ends: 127 [2022-12-14 13:02:32,857 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 13:02:32,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=760, Invalid=14492, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 13:02:32,858 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:32,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 623 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:02:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 13:02:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-12-14 13:02:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 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) [2022-12-14 13:02:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-12-14 13:02:32,901 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 68 [2022-12-14 13:02:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:32,901 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-12-14 13:02:32,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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) [2022-12-14 13:02:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-12-14 13:02:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 13:02:32,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:32,901 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 13:02:32,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:33,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:33,102 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1243796347, now seen corresponding path program 27 times [2022-12-14 13:02:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:33,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555027855] [2022-12-14 13:02:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:33,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 188 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:33,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555027855] [2022-12-14 13:02:33,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555027855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178871726] [2022-12-14 13:02:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:02:33,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:33,465 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:33,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 13:02:33,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:02:33,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:02:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 222 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:34,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 222 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178871726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115158260] [2022-12-14 13:02:34,317 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:34,317 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:34,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:34,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:34,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:34,342 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:34,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:34,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:34,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:34,367 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:34,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:34,424 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:34,424 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:02:34,486 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:34,576 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:34,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:35,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15876#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:35,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:35,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:35,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-12-14 13:02:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580642424] [2022-12-14 13:02:35,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:35,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 13:02:35,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 13:02:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:02:35,225 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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) [2022-12-14 13:02:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:35,440 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-12-14 13:02:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:02:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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 [2022-12-14 13:02:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:35,441 INFO L225 Difference]: With dead ends: 130 [2022-12-14 13:02:35,441 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 13:02:35,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:02:35,441 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 13:02:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 13:02:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 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) [2022-12-14 13:02:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2022-12-14 13:02:35,482 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 69 [2022-12-14 13:02:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:35,482 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2022-12-14 13:02:35,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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) [2022-12-14 13:02:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2022-12-14 13:02:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:02:35,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:35,483 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 13, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 13:02:35,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:35,684 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash 490514594, now seen corresponding path program 28 times [2022-12-14 13:02:35,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:35,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882052138] [2022-12-14 13:02:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:36,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:36,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882052138] [2022-12-14 13:02:36,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882052138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:36,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642238480] [2022-12-14 13:02:36,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:36,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:36,647 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:36,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:02:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 13:02:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:37,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:02:38,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:38,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:02:38,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:02:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:39,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642238480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2051822818] [2022-12-14 13:02:39,836 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:39,837 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:39,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:39,837 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:39,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:39,869 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:39,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:39,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:39,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:39,893 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:39,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:39,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:39,959 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:39,959 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:02:40,034 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:40,116 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:40,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:41,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16694#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:41,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:41,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:41,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 87 [2022-12-14 13:02:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663708140] [2022-12-14 13:02:41,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 13:02:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 13:02:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=8609, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 13:02:41,521 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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) [2022-12-14 13:02:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:43,416 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-12-14 13:02:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 13:02:43,416 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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 71 [2022-12-14 13:02:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:43,417 INFO L225 Difference]: With dead ends: 135 [2022-12-14 13:02:43,417 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 13:02:43,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=483, Invalid=11949, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 13:02:43,418 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:43,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 962 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 13:02:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 13:02:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2022-12-14 13:02:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-12-14 13:02:43,461 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 71 [2022-12-14 13:02:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:43,461 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-12-14 13:02:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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) [2022-12-14 13:02:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-12-14 13:02:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 13:02:43,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:43,462 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 13, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 13:02:43,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:02:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 13:02:43,663 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1858744311, now seen corresponding path program 29 times [2022-12-14 13:02:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709792891] [2022-12-14 13:02:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:43,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:44,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709792891] [2022-12-14 13:02:44,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709792891] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735586299] [2022-12-14 13:02:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:02:44,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:44,593 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 13:02:45,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 13:02:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 13:02:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:45,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:02:45,233 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:02:45,233 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:02:45,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:02:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:45,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:46,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:02:46,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:02:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:47,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735586299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:47,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008909643] [2022-12-14 13:02:47,232 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:47,232 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:47,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:47,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:47,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:47,260 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:02:47,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:02:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:47,290 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:47,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:47,309 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:47,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:47,372 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:47,373 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:02:47,441 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:47,545 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:47,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:48,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17559#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:48,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:48,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:48,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 77 [2022-12-14 13:02:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932702264] [2022-12-14 13:02:48,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:48,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-14 13:02:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-14 13:02:48,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=6862, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 13:02:48,758 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 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) [2022-12-14 13:02:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:51,849 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-12-14 13:02:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 13:02:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 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 73 [2022-12-14 13:02:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:51,849 INFO L225 Difference]: With dead ends: 133 [2022-12-14 13:02:51,849 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 13:02:51,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=644, Invalid=12696, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 13:02:51,850 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:51,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 635 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 13:02:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 13:02:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2022-12-14 13:02:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 89 states have internal predecessors, (99), 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) [2022-12-14 13:02:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-12-14 13:02:51,896 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 73 [2022-12-14 13:02:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:51,897 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-12-14 13:02:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 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) [2022-12-14 13:02:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-12-14 13:02:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:02:51,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:51,897 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 13:02:51,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:52,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 13:02:52,098 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:52,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1446681809, now seen corresponding path program 30 times [2022-12-14 13:02:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655987923] [2022-12-14 13:02:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:52,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 223 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:52,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655987923] [2022-12-14 13:02:52,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655987923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865288238] [2022-12-14 13:02:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:02:52,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:52,518 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:52,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 13:02:52,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:02:52,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:02:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:53,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865288238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983748817] [2022-12-14 13:02:53,460 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:53,460 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:53,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:53,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:53,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:53,483 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:02:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:02:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:53,508 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:53,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:53,526 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:02:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:53,570 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:02:53,570 INFO L350 Elim1Store]: Elim1 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 251 treesize of output 247 [2022-12-14 13:02:53,610 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:53,691 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:53,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:54,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18424#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:02:54,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:54,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:54,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-12-14 13:02:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399360846] [2022-12-14 13:02:54,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:02:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:02:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2326, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 13:02:54,393 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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) [2022-12-14 13:02:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:54,606 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2022-12-14 13:02:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:02:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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 74 [2022-12-14 13:02:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:54,607 INFO L225 Difference]: With dead ends: 136 [2022-12-14 13:02:54,607 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 13:02:54,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=536, Invalid=2326, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 13:02:54,608 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:54,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 13:02:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-14 13:02:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.101123595505618) internal successors, (98), 89 states have internal predecessors, (98), 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) [2022-12-14 13:02:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-12-14 13:02:54,659 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 74 [2022-12-14 13:02:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:54,659 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-12-14 13:02:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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) [2022-12-14 13:02:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-12-14 13:02:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 13:02:54,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:54,659 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 13:02:54,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 13:02:54,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:54,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1166731274, now seen corresponding path program 31 times [2022-12-14 13:02:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:54,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517888399] [2022-12-14 13:02:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:55,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:55,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517888399] [2022-12-14 13:02:55,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517888399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230233933] [2022-12-14 13:02:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:55,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:55,796 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:55,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:02:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:55,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 13:02:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:56,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:02:57,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:57,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:57,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:02:57,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:02:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230233933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:58,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025923924] [2022-12-14 13:02:58,702 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:58,702 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:58,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:58,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:58,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:58,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:58,724 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:02:58,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:02:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:58,745 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:02:58,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:02:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:58,764 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:02:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:58,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:58,819 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:02:58,819 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:02:58,861 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:58,951 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:02:58,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:00,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19290#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:00,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:00,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:00,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 93 [2022-12-14 13:03:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723097012] [2022-12-14 13:03:00,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:00,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-12-14 13:03:00,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-12-14 13:03:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9755, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 13:03:00,203 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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) [2022-12-14 13:03:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:02,511 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-12-14 13:03:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:03:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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 76 [2022-12-14 13:03:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:02,512 INFO L225 Difference]: With dead ends: 141 [2022-12-14 13:03:02,512 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 13:03:02,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=517, Invalid=13525, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 13:03:02,513 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:02,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1024 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:03:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 13:03:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2022-12-14 13:03:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 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) [2022-12-14 13:03:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-12-14 13:03:02,564 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 76 [2022-12-14 13:03:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:02,564 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-12-14 13:03:02,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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) [2022-12-14 13:03:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-12-14 13:03:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 13:03:02,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:02,564 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 14, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 13:03:02,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:02,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 13:03:02,766 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1577760509, now seen corresponding path program 32 times [2022-12-14 13:03:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:02,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555395597] [2022-12-14 13:03:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:03,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555395597] [2022-12-14 13:03:03,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555395597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339942231] [2022-12-14 13:03:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:03:03,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:03,755 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:03,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 13:03:04,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 13:03:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 13:03:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:04,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:03:04,532 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:03:04,532 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:03:05,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:03:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:05,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:05,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:03:05,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:03:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:06,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339942231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:06,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093951216] [2022-12-14 13:03:06,688 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:06,688 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:06,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:06,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:06,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:06,711 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:03:06,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:03:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:06,735 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:06,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:06,752 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:06,811 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:06,811 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:03:06,884 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:06,966 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:06,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:08,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20204#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:08,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:08,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:08,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 82 [2022-12-14 13:03:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764793857] [2022-12-14 13:03:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 13:03:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 13:03:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=7716, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 13:03:08,103 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 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) [2022-12-14 13:03:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:11,360 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2022-12-14 13:03:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 13:03:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 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) Word has length 78 [2022-12-14 13:03:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:11,361 INFO L225 Difference]: With dead ends: 139 [2022-12-14 13:03:11,361 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 13:03:11,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=683, Invalid=14323, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 13:03:11,362 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 122 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:11,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 760 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:03:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 13:03:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2022-12-14 13:03:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 92 states have internal predecessors, (101), 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) [2022-12-14 13:03:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-12-14 13:03:11,417 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 78 [2022-12-14 13:03:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:11,417 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-12-14 13:03:11,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 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) [2022-12-14 13:03:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-12-14 13:03:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:03:11,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:11,417 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2022-12-14 13:03:11,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 13:03:11,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 13:03:11,619 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1073789847, now seen corresponding path program 33 times [2022-12-14 13:03:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292341538] [2022-12-14 13:03:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:11,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 261 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:12,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:12,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292341538] [2022-12-14 13:03:12,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292341538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:12,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871452182] [2022-12-14 13:03:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:03:12,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:12,077 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:12,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 13:03:12,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:03:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:03:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 301 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 301 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:13,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871452182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075169421] [2022-12-14 13:03:13,063 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:13,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:13,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:13,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:13,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:13,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:13,095 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:13,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:13,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:03:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:13,119 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:13,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:13,172 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:13,172 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:03:13,232 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:13,310 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:13,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:14,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21118#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:14,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:14,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:14,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2022-12-14 13:03:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266464743] [2022-12-14 13:03:14,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 13:03:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 13:03:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=2590, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 13:03:14,037 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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) [2022-12-14 13:03:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:14,393 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2022-12-14 13:03:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 13:03:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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 79 [2022-12-14 13:03:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:14,394 INFO L225 Difference]: With dead ends: 142 [2022-12-14 13:03:14,394 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 13:03:14,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 182 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=602, Invalid=2590, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 13:03:14,395 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:14,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 234 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:03:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 13:03:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-14 13:03:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 92 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-12-14 13:03:14,455 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 79 [2022-12-14 13:03:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-12-14 13:03:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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) [2022-12-14 13:03:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-12-14 13:03:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 13:03:14,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:14,455 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 15, 14, 14, 1, 1, 1, 1, 1] [2022-12-14 13:03:14,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 13:03:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 13:03:14,657 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:14,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1063916752, now seen corresponding path program 34 times [2022-12-14 13:03:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488484821] [2022-12-14 13:03:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:15,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:15,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488484821] [2022-12-14 13:03:15,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488484821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:15,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113119669] [2022-12-14 13:03:15,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:03:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:15,700 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:15,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 13:03:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 13:03:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:16,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:03:17,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:03:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:17,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:18,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:03:18,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:03:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:19,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113119669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:19,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186040548] [2022-12-14 13:03:19,100 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:19,100 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:19,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:19,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:19,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:19,129 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:03:19,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:03:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:19,152 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:19,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:19,169 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:19,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:19,224 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:19,224 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:03:19,299 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:19,379 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:19,384 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:20,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22032#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:20,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:20,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:20,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 99 [2022-12-14 13:03:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107598795] [2022-12-14 13:03:20,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:20,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-14 13:03:20,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-14 13:03:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10979, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 13:03:20,570 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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) [2022-12-14 13:03:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:22,821 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2022-12-14 13:03:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 13:03:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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 81 [2022-12-14 13:03:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:22,822 INFO L225 Difference]: With dead ends: 147 [2022-12-14 13:03:22,822 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 13:03:22,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=545, Invalid=15205, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 13:03:22,823 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 3803 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:22,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1111 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3803 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 13:03:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 13:03:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 97. [2022-12-14 13:03:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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) [2022-12-14 13:03:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-12-14 13:03:22,900 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 81 [2022-12-14 13:03:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:22,901 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-12-14 13:03:22,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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) [2022-12-14 13:03:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-12-14 13:03:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 13:03:22,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:22,902 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 15, 14, 14, 1, 1, 1, 1, 1] [2022-12-14 13:03:22,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:23,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:23,103 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1889376393, now seen corresponding path program 35 times [2022-12-14 13:03:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452049091] [2022-12-14 13:03:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:24,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452049091] [2022-12-14 13:03:24,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452049091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090664962] [2022-12-14 13:03:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:03:24,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:24,159 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:24,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 13:03:24,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 13:03:24,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 13:03:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:03:25,196 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:03:25,196 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:03:25,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:03:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:26,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:03:26,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:03:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:27,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090664962] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877373060] [2022-12-14 13:03:27,695 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:27,696 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:27,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:27,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:27,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:27,724 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:27,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:27,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:03:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:27,748 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:27,802 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:27,802 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:03:27,879 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:27,954 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:27,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:29,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22995#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:29,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:29,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:29,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 87 [2022-12-14 13:03:29,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870307766] [2022-12-14 13:03:29,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:29,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 13:03:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 13:03:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=8623, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 13:03:29,120 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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) [2022-12-14 13:03:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:32,924 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2022-12-14 13:03:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 13:03:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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 83 [2022-12-14 13:03:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:32,924 INFO L225 Difference]: With dead ends: 145 [2022-12-14 13:03:32,924 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 13:03:32,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=719, Invalid=16051, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 13:03:32,925 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:32,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 794 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3563 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 13:03:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 13:03:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2022-12-14 13:03:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:03:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-12-14 13:03:32,988 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 83 [2022-12-14 13:03:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:32,988 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-12-14 13:03:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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) [2022-12-14 13:03:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-12-14 13:03:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 13:03:32,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:32,989 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2022-12-14 13:03:32,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:33,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 13:03:33,190 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1709532701, now seen corresponding path program 36 times [2022-12-14 13:03:33,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:33,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511248593] [2022-12-14 13:03:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:33,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 302 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:33,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:33,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511248593] [2022-12-14 13:03:33,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511248593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:33,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162123193] [2022-12-14 13:03:33,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:03:33,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:33,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:33,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:33,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 13:03:34,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:03:34,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 13:03:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 345 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:34,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 345 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162123193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152963319] [2022-12-14 13:03:34,922 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:34,922 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:34,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:34,923 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:34,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:34,949 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:03:34,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:03:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:34,970 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:34,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:34,989 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:35,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:35,051 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:35,051 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:03:35,092 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:35,163 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:35,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:35,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23958#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:35,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:35,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:35,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2022-12-14 13:03:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273351506] [2022-12-14 13:03:35,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:03:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:03:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:03:35,842 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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) [2022-12-14 13:03:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:36,193 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-12-14 13:03:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 13:03:36,194 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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 84 [2022-12-14 13:03:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:36,194 INFO L225 Difference]: With dead ends: 148 [2022-12-14 13:03:36,194 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 13:03:36,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 32 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:03:36,195 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:36,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 220 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:03:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 13:03:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-14 13:03:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 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) [2022-12-14 13:03:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-12-14 13:03:36,259 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 84 [2022-12-14 13:03:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:36,260 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-12-14 13:03:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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) [2022-12-14 13:03:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-12-14 13:03:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 13:03:36,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:36,260 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 15, 15, 1, 1, 1, 1, 1] [2022-12-14 13:03:36,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:36,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-14 13:03:36,461 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash -860556836, now seen corresponding path program 37 times [2022-12-14 13:03:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303797874] [2022-12-14 13:03:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:36,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:37,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303797874] [2022-12-14 13:03:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303797874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860307034] [2022-12-14 13:03:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:03:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:37,494 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 13:03:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 13:03:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:38,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:03:39,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:03:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:40,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:03:40,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:03:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:41,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860307034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:41,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909373439] [2022-12-14 13:03:41,316 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:41,316 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:41,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:41,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:41,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,341 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:41,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:03:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,366 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:03:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:41,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:41,427 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:03:41,428 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:03:41,493 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:41,570 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:41,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:43,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24920#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:43,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:43,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:43,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 105 [2022-12-14 13:03:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910997639] [2022-12-14 13:03:43,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-12-14 13:03:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-12-14 13:03:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=12272, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 13:03:43,041 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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) [2022-12-14 13:03:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:45,711 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2022-12-14 13:03:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 13:03:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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 86 [2022-12-14 13:03:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:45,711 INFO L225 Difference]: With dead ends: 153 [2022-12-14 13:03:45,711 INFO L226 Difference]: Without dead ends: 151 [2022-12-14 13:03:45,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3761 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=576, Invalid=16980, Unknown=0, NotChecked=0, Total=17556 [2022-12-14 13:03:45,713 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:45,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1302 Invalid, 4602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 13:03:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-14 13:03:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2022-12-14 13:03:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 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) [2022-12-14 13:03:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-12-14 13:03:45,786 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 86 [2022-12-14 13:03:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:45,786 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-12-14 13:03:45,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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) [2022-12-14 13:03:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-12-14 13:03:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 13:03:45,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:45,787 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 16, 15, 15, 1, 1, 1, 1, 1] [2022-12-14 13:03:45,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 13:03:45,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:45,987 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1038536811, now seen corresponding path program 38 times [2022-12-14 13:03:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424846861] [2022-12-14 13:03:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:45,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:47,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424846861] [2022-12-14 13:03:47,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424846861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007928569] [2022-12-14 13:03:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:03:47,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:47,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:47,063 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:47,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 13:03:47,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 13:03:47,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 13:03:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:48,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:03:48,114 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:03:48,114 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:03:48,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:03:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:48,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:49,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:03:49,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:03:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007928569] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845023818] [2022-12-14 13:03:50,976 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:50,976 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:50,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:50,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:50,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:51,007 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:51,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:51,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:03:51,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:51,031 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:03:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:51,080 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:03:51,081 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:03:51,121 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:51,212 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:51,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:52,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:52,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:52,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-12-14 13:03:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848824190] [2022-12-14 13:03:52,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:52,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-12-14 13:03:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-12-14 13:03:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=9574, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:03:52,474 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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) [2022-12-14 13:03:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:56,339 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2022-12-14 13:03:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 13:03:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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 88 [2022-12-14 13:03:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:56,340 INFO L225 Difference]: With dead ends: 151 [2022-12-14 13:03:56,340 INFO L226 Difference]: Without dead ends: 149 [2022-12-14 13:03:56,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=761, Invalid=17871, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 13:03:56,341 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 4224 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:56,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1010 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4224 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 13:03:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-14 13:03:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2022-12-14 13:03:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 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) [2022-12-14 13:03:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2022-12-14 13:03:56,416 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 88 [2022-12-14 13:03:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:56,416 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2022-12-14 13:03:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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) [2022-12-14 13:03:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2022-12-14 13:03:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 13:03:56,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:56,417 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2022-12-14 13:03:56,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:56,618 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash -183758505, now seen corresponding path program 39 times [2022-12-14 13:03:56,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:56,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535673023] [2022-12-14 13:03:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:56,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 346 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:57,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535673023] [2022-12-14 13:03:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535673023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995640999] [2022-12-14 13:03:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:03:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:57,133 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:57,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 13:03:57,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:03:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:03:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:03:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 392 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:58,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 392 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:03:58,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995640999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915421346] [2022-12-14 13:03:58,672 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:03:58,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:58,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:58,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:58,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:58,702 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:03:58,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:03:58,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:58,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:03:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:58,724 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:03:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:03:58,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:58,787 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:03:58,787 INFO L350 Elim1Store]: Elim1 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 263 treesize of output 269 [2022-12-14 13:03:58,829 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:58,912 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:03:58,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:03:59,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26944#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:03:59,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:03:59,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:03:59,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2022-12-14 13:03:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412703130] [2022-12-14 13:03:59,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 13:03:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 13:03:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3157, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:03:59,681 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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) [2022-12-14 13:04:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:00,025 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-12-14 13:04:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 13:04:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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 89 [2022-12-14 13:04:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:00,026 INFO L225 Difference]: With dead ends: 154 [2022-12-14 13:04:00,026 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 13:04:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 34 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=749, Invalid=3157, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:04:00,027 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:00,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:04:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 13:04:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 13:04:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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) [2022-12-14 13:04:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-12-14 13:04:00,099 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2022-12-14 13:04:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:00,099 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-12-14 13:04:00,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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) [2022-12-14 13:04:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-12-14 13:04:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 13:04:00,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:00,100 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 16, 16, 1, 1, 1, 1, 1] [2022-12-14 13:04:00,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 13:04:00,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 13:04:00,301 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1899416830, now seen corresponding path program 40 times [2022-12-14 13:04:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809748944] [2022-12-14 13:04:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:01,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809748944] [2022-12-14 13:04:01,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809748944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436225253] [2022-12-14 13:04:01,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:04:01,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:01,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:01,543 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:01,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 13:04:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 13:04:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:02,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:04:03,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:04:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:03,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:04,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:04:04,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:04:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:05,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436225253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013396357] [2022-12-14 13:04:05,920 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:05,920 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:05,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:05,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:05,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:05,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:05,948 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:05,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:05,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:04:05,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:05,974 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:04:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:06,021 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:04:06,021 INFO L350 Elim1Store]: Elim1 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 257 treesize of output 253 [2022-12-14 13:04:06,059 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:06,135 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:06,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:07,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27954#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:07,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:07,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 111 [2022-12-14 13:04:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918713985] [2022-12-14 13:04:07,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-12-14 13:04:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-12-14 13:04:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=13637, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 13:04:07,495 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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) [2022-12-14 13:04:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:10,093 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-12-14 13:04:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:04:10,093 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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 91 [2022-12-14 13:04:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:10,094 INFO L225 Difference]: With dead ends: 159 [2022-12-14 13:04:10,095 INFO L226 Difference]: Without dead ends: 157 [2022-12-14 13:04:10,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4170 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=607, Invalid=18853, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 13:04:10,096 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 4483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 4485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:10,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1282 Invalid, 4485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4483 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 13:04:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-14 13:04:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2022-12-14 13:04:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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) [2022-12-14 13:04:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2022-12-14 13:04:10,179 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 91 [2022-12-14 13:04:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2022-12-14 13:04:10,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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) [2022-12-14 13:04:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2022-12-14 13:04:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:04:10,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:10,180 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 17, 16, 16, 1, 1, 1, 1, 1] [2022-12-14 13:04:10,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 13:04:10,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 13:04:10,382 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1918813467, now seen corresponding path program 41 times [2022-12-14 13:04:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:10,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526017155] [2022-12-14 13:04:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:11,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526017155] [2022-12-14 13:04:11,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526017155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444165276] [2022-12-14 13:04:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:04:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:11,677 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:11,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 13:04:12,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-14 13:04:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:12,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 13:04:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:13,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:04:13,106 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:04:13,106 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:04:13,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:04:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:14,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:14,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:04:14,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:04:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444165276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627413489] [2022-12-14 13:04:16,034 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:16,034 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:16,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:16,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:16,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:16,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:16,059 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:04:16,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:04:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:16,085 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:16,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:16,101 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:04:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:04:16,155 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:04:16,156 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 250 [2022-12-14 13:04:16,218 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:16,286 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:16,296 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:17,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29015#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:17,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:17,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-12-14 13:04:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121563197] [2022-12-14 13:04:17,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:17,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-14 13:04:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-14 13:04:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=10581, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 13:04:17,544 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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) [2022-12-14 13:04:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:22,051 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-12-14 13:04:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 13:04:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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 93 [2022-12-14 13:04:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:22,051 INFO L225 Difference]: With dead ends: 157 [2022-12-14 13:04:22,051 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 13:04:22,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=797, Invalid=19795, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 13:04:22,052 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 4488 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:22,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1090 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4488 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:04:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 13:04:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-12-14 13:04:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 101 states have internal predecessors, (107), 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) [2022-12-14 13:04:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2022-12-14 13:04:22,135 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 93 [2022-12-14 13:04:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:22,135 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2022-12-14 13:04:22,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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) [2022-12-14 13:04:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2022-12-14 13:04:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:04:22,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:22,136 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2022-12-14 13:04:22,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 13:04:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:22,337 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash -662189323, now seen corresponding path program 42 times [2022-12-14 13:04:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721549103] [2022-12-14 13:04:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:22,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 393 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:22,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721549103] [2022-12-14 13:04:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721549103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43899785] [2022-12-14 13:04:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:04:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:22,970 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:22,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 13:04:23,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:04:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 13:04:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 442 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:23,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 442 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:24,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43899785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423195215] [2022-12-14 13:04:24,331 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:24,331 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:24,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:24,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:24,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:24,357 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:24,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:24,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:04:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:24,382 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:04:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:04:24,435 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:04:24,436 INFO L350 Elim1Store]: Elim1 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 244 treesize of output 246 [2022-12-14 13:04:24,512 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:24,602 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:24,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:25,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30076#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:25,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:25,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:25,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-12-14 13:04:25,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149768205] [2022-12-14 13:04:25,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:25,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 13:04:25,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 13:04:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=3466, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 13:04:25,268 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 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) [2022-12-14 13:04:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:25,653 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-12-14 13:04:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 13:04:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-12-14 13:04:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:25,654 INFO L225 Difference]: With dead ends: 160 [2022-12-14 13:04:25,654 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 13:04:25,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 218 SyntacticMatches, 36 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=824, Invalid=3466, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 13:04:25,654 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:25,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 211 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:04:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 13:04:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-12-14 13:04:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 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) [2022-12-14 13:04:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-12-14 13:04:25,739 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 94 [2022-12-14 13:04:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:25,739 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-12-14 13:04:25,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 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) [2022-12-14 13:04:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-12-14 13:04:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 13:04:25,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:25,739 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 17, 17, 1, 1, 1, 1, 1] [2022-12-14 13:04:25,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 13:04:25,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-14 13:04:25,940 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1647099986, now seen corresponding path program 43 times [2022-12-14 13:04:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481701774] [2022-12-14 13:04:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:25,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:27,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481701774] [2022-12-14 13:04:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481701774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719031824] [2022-12-14 13:04:27,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:04:27,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:27,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:27,239 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:27,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 13:04:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 13:04:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:28,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:04:29,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:04:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:30,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:04:30,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:04:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:31,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719031824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:31,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193792357] [2022-12-14 13:04:31,652 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:31,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:31,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:31,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:31,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:31,676 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:04:31,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:04:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:31,701 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:31,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:31,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:31,718 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:04:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:31,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:04:31,771 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:04:31,772 INFO L350 Elim1Store]: Elim1 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 234 treesize of output 236 [2022-12-14 13:04:31,813 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:31,888 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:32,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31134#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:32,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:32,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:32,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 117 [2022-12-14 13:04:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573855643] [2022-12-14 13:04:32,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:32,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-14 13:04:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-14 13:04:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=15072, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 13:04:32,966 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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) [2022-12-14 13:04:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:36,002 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2022-12-14 13:04:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 13:04:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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 96 [2022-12-14 13:04:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:36,002 INFO L225 Difference]: With dead ends: 165 [2022-12-14 13:04:36,002 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 13:04:36,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=640, Invalid=20822, Unknown=0, NotChecked=0, Total=21462 [2022-12-14 13:04:36,003 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 5091 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 5093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:36,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1473 Invalid, 5093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5091 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 13:04:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 13:04:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2022-12-14 13:04:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 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) [2022-12-14 13:04:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-12-14 13:04:36,098 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 96 [2022-12-14 13:04:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:36,098 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-12-14 13:04:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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) [2022-12-14 13:04:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-12-14 13:04:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 13:04:36,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:36,099 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 18, 17, 17, 1, 1, 1, 1, 1] [2022-12-14 13:04:36,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 13:04:36,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 13:04:36,299 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1041525287, now seen corresponding path program 44 times [2022-12-14 13:04:36,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:36,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108364957] [2022-12-14 13:04:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:36,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:37,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108364957] [2022-12-14 13:04:37,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108364957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837202303] [2022-12-14 13:04:37,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:04:37,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:37,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:37,701 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:37,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 13:04:38,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 13:04:38,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:39,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-14 13:04:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:39,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:04:39,264 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:04:39,264 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:04:40,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:04:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:40,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:04:41,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 13:04:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837202303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967377074] [2022-12-14 13:04:42,556 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:42,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:42,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:42,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:42,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:42,582 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:04:42,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:04:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:42,608 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:42,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:42,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:42,624 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:04:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:04:42,675 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:04:42,675 INFO L350 Elim1Store]: Elim1 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 238 treesize of output 240 [2022-12-14 13:04:42,720 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:42,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:43,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32244#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:43,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:43,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:43,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-12-14 13:04:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825327305] [2022-12-14 13:04:43,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 13:04:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 13:04:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=11633, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 13:04:43,882 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:04:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:49,175 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-12-14 13:04:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 13:04:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-14 13:04:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:49,176 INFO L225 Difference]: With dead ends: 163 [2022-12-14 13:04:49,176 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 13:04:49,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=838, Invalid=21812, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 13:04:49,177 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 4696 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 4718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:49,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1073 Invalid, 4718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4696 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 13:04:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 13:04:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2022-12-14 13:04:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 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) [2022-12-14 13:04:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-12-14 13:04:49,272 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 98 [2022-12-14 13:04:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:49,272 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-12-14 13:04:49,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:04:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-12-14 13:04:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 13:04:49,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:49,273 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-12-14 13:04:49,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 13:04:49,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:49,474 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:49,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1250826821, now seen corresponding path program 45 times [2022-12-14 13:04:49,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185980274] [2022-12-14 13:04:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:49,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 443 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:50,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:50,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185980274] [2022-12-14 13:04:50,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185980274] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:50,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532073917] [2022-12-14 13:04:50,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:04:50,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:50,170 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:50,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 13:04:50,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:04:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:50,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 13:04:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 495 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:51,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 495 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:51,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532073917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:04:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060117161] [2022-12-14 13:04:51,948 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:04:51,948 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:04:51,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:04:51,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:04:51,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:51,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:51,973 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:04:51,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:04:51,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:51,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:04:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:51,996 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:04:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:52,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:04:52,044 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:04:52,044 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 243 [2022-12-14 13:04:52,072 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:04:52,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:52,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33354#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:04:52,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:04:52,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:04:52,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-12-14 13:04:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890808335] [2022-12-14 13:04:52,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:04:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 13:04:52,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 13:04:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:04:52,833 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 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) [2022-12-14 13:04:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:53,275 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-12-14 13:04:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 13:04:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-12-14 13:04:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:53,276 INFO L225 Difference]: With dead ends: 166 [2022-12-14 13:04:53,276 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 13:04:53,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 230 SyntacticMatches, 38 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:04:53,277 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:53,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 193 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:04:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 13:04:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-12-14 13:04:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2022-12-14 13:04:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-12-14 13:04:53,372 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 99 [2022-12-14 13:04:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:53,372 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-12-14 13:04:53,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 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) [2022-12-14 13:04:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-12-14 13:04:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 13:04:53,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:53,373 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 18, 18, 1, 1, 1, 1, 1] [2022-12-14 13:04:53,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 13:04:53,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:53,574 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1241231660, now seen corresponding path program 46 times [2022-12-14 13:04:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679741832] [2022-12-14 13:04:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:55,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679741832] [2022-12-14 13:04:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679741832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774995060] [2022-12-14 13:04:55,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:04:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:55,247 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:55,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 13:04:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 13:04:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:56,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:04:57,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:04:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:57,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:04:59,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:04:59,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:05:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:00,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774995060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424283296] [2022-12-14 13:05:00,745 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:00,745 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:00,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:00,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:00,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:00,772 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:05:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:05:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:00,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:05:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:00,795 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:05:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:00,844 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:05:00,844 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 243 [2022-12-14 13:05:00,878 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:05:00,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:02,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34460#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:05:02,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:02,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:02,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 123 [2022-12-14 13:05:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436955852] [2022-12-14 13:05:02,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:02,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-12-14 13:05:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-12-14 13:05:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=16581, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 13:05:02,300 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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) [2022-12-14 13:05:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:05,854 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2022-12-14 13:05:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 13:05:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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 101 [2022-12-14 13:05:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:05,855 INFO L225 Difference]: With dead ends: 171 [2022-12-14 13:05:05,855 INFO L226 Difference]: Without dead ends: 169 [2022-12-14 13:05:05,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=671, Invalid=22891, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 13:05:05,856 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 5813 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 5815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:05,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1643 Invalid, 5815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5813 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 13:05:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-14 13:05:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 109. [2022-12-14 13:05:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 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) [2022-12-14 13:05:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-12-14 13:05:05,964 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 101 [2022-12-14 13:05:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:05,965 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-12-14 13:05:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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) [2022-12-14 13:05:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-12-14 13:05:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 13:05:05,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:05,965 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 19, 18, 18, 1, 1, 1, 1, 1] [2022-12-14 13:05:05,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-14 13:05:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-14 13:05:06,166 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 610216531, now seen corresponding path program 47 times [2022-12-14 13:05:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455415174] [2022-12-14 13:05:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:07,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455415174] [2022-12-14 13:05:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455415174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245024192] [2022-12-14 13:05:07,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:05:07,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:07,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:07,793 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:07,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 13:05:09,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-14 13:05:09,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 13:05:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:09,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:05:09,949 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:05:09,950 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:05:10,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:05:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:12,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:05:12,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:05:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245024192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633802507] [2022-12-14 13:05:13,777 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:13,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:13,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:13,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:13,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:13,807 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:05:13,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:05:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:13,836 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:05:13,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:05:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:13,854 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:05:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:13,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:13,916 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:05:13,917 INFO L350 Elim1Store]: Elim1 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 234 treesize of output 236 [2022-12-14 13:05:13,976 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:05:14,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:15,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35619#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:05:15,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:15,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-12-14 13:05:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450194810] [2022-12-14 13:05:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-14 13:05:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-14 13:05:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=12737, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 13:05:15,209 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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) [2022-12-14 13:05:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:21,080 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-12-14 13:05:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 13:05:21,080 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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 103 [2022-12-14 13:05:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:21,080 INFO L225 Difference]: With dead ends: 169 [2022-12-14 13:05:21,080 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 13:05:21,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=877, Invalid=23929, Unknown=0, NotChecked=0, Total=24806 [2022-12-14 13:05:21,082 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 5444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:21,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1293 Invalid, 5444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 13:05:21,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 13:05:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 108. [2022-12-14 13:05:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 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) [2022-12-14 13:05:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-12-14 13:05:21,188 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 103 [2022-12-14 13:05:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:21,188 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-12-14 13:05:21,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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) [2022-12-14 13:05:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-12-14 13:05:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 13:05:21,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:21,189 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:05:21,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 13:05:21,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-14 13:05:21,390 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2130882553, now seen corresponding path program 48 times [2022-12-14 13:05:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751617078] [2022-12-14 13:05:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 496 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:22,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751617078] [2022-12-14 13:05:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751617078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046886122] [2022-12-14 13:05:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:05:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:22,149 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:22,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 13:05:22,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:05:22,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:22,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 13:05:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 551 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:23,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 551 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:24,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046886122] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:24,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614537059] [2022-12-14 13:05:24,128 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:24,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:24,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:24,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:24,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:24,155 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:05:24,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:05:24,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:24,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:05:24,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:24,187 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:05:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:24,260 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:05:24,261 INFO L350 Elim1Store]: Elim1 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 241 treesize of output 237 [2022-12-14 13:05:24,294 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:05:24,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:25,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36778#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:05:25,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:25,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:25,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-12-14 13:05:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299590739] [2022-12-14 13:05:25,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:25,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 13:05:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 13:05:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:05:25,005 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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) [2022-12-14 13:05:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:25,451 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2022-12-14 13:05:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:05:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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 104 [2022-12-14 13:05:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:25,452 INFO L225 Difference]: With dead ends: 172 [2022-12-14 13:05:25,452 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 13:05:25,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 242 SyntacticMatches, 40 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:05:25,453 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:25,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 180 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:05:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 13:05:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-12-14 13:05:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 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) [2022-12-14 13:05:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-12-14 13:05:25,649 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2022-12-14 13:05:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:25,650 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-12-14 13:05:25,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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) [2022-12-14 13:05:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-12-14 13:05:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 13:05:25,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:25,650 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:05:25,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 13:05:25,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:25,851 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1630736000, now seen corresponding path program 49 times [2022-12-14 13:05:25,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:25,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245071190] [2022-12-14 13:05:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:25,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:27,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:27,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245071190] [2022-12-14 13:05:27,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245071190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:27,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901567575] [2022-12-14 13:05:27,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:05:27,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:27,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:27,473 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 13:05:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-14 13:05:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:28,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:05:30,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:05:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:30,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:31,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 13:05:31,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 13:05:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901567575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376839016] [2022-12-14 13:05:33,172 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:33,172 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:33,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:33,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:33,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:33,204 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:05:33,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:05:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:33,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:05:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:33,226 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:05:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:33,298 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:05:33,299 INFO L350 Elim1Store]: Elim1 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 234 treesize of output 236 [2022-12-14 13:05:33,330 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:05:33,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:34,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:05:34,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:34,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 129 [2022-12-14 13:05:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869116011] [2022-12-14 13:05:34,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-12-14 13:05:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-12-14 13:05:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=18162, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 13:05:34,797 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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) [2022-12-14 13:05:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:39,132 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-12-14 13:05:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 13:05:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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 106 [2022-12-14 13:05:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:39,133 INFO L225 Difference]: With dead ends: 178 [2022-12-14 13:05:39,133 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 13:05:39,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=702, Invalid=25058, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 13:05:39,134 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 6672 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 6674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:39,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1859 Invalid, 6674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6672 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 13:05:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 13:05:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 113. [2022-12-14 13:05:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 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) [2022-12-14 13:05:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-12-14 13:05:39,279 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-12-14 13:05:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:39,279 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-12-14 13:05:39,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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) [2022-12-14 13:05:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-12-14 13:05:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 13:05:39,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:39,280 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:05:39,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-14 13:05:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:39,480 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 753345632, now seen corresponding path program 3 times [2022-12-14 13:05:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:39,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452036269] [2022-12-14 13:05:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 13:05:39,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452036269] [2022-12-14 13:05:39,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452036269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198663782] [2022-12-14 13:05:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:05:39,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:39,959 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:39,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 13:05:40,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:05:40,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:05:40,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 13:05:41,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 13:05:41,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198663782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294096378] [2022-12-14 13:05:41,632 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:41,632 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:41,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:41,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:41,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:41,656 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:05:41,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:05:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:41,682 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:05:41,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:05:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:41,696 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:05:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:41,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:41,754 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:05:41,754 INFO L350 Elim1Store]: Elim1 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 238 treesize of output 240 [2022-12-14 13:05:41,799 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:05:41,853 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:42,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39094#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 1 |ULTIMATE.start_main_~k~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:05:42,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:42,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:42,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2022-12-14 13:05:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010975731] [2022-12-14 13:05:42,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 13:05:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 13:05:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2284, Invalid=3722, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 13:05:42,290 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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) [2022-12-14 13:05:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:45,289 INFO L93 Difference]: Finished difference Result 1771 states and 1821 transitions. [2022-12-14 13:05:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 13:05:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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 107 [2022-12-14 13:05:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:45,293 INFO L225 Difference]: With dead ends: 1771 [2022-12-14 13:05:45,293 INFO L226 Difference]: Without dead ends: 1709 [2022-12-14 13:05:45,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2284, Invalid=3722, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 13:05:45,294 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 434 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:45,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 157 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:05:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-12-14 13:05:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 160. [2022-12-14 13:05:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.169811320754717) internal successors, (186), 159 states have internal predecessors, (186), 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) [2022-12-14 13:05:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2022-12-14 13:05:45,478 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 107 [2022-12-14 13:05:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:45,478 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2022-12-14 13:05:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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) [2022-12-14 13:05:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2022-12-14 13:05:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:45,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:45,479 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:05:45,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:45,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-14 13:05:45,680 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2026235719, now seen corresponding path program 50 times [2022-12-14 13:05:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:45,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380240239] [2022-12-14 13:05:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:47,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380240239] [2022-12-14 13:05:47,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380240239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565420421] [2022-12-14 13:05:47,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:05:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:47,658 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 13:05:50,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-14 13:05:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 13:05:50,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:50,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:05:50,437 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 13:05:50,437 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 34 [2022-12-14 13:05:53,926 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 13:05:53,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 36 [2022-12-14 13:05:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 496 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:57,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 13:05:57,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2022-12-14 13:06:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 513 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:00,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565420421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175472139] [2022-12-14 13:06:00,395 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:06:00,395 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:06:00,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:06:00,395 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:06:00,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:06:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:00,424 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:06:00,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:06:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:00,448 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:06:00,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:06:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:00,472 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:06:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:00,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:06:00,552 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:06:00,552 INFO L350 Elim1Store]: Elim1 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 253 treesize of output 259 [2022-12-14 13:06:00,595 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:06:00,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:06:02,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42445#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:06:02,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:06:02,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:06:02,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 45] total 114 [2022-12-14 13:06:02,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903390304] [2022-12-14 13:06:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-12-14 13:06:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-12-14 13:06:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1425, Invalid=13335, Unknown=2, NotChecked=0, Total=14762 [2022-12-14 13:06:02,106 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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) [2022-12-14 13:06:09,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:06:11,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:06:45,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:08:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:03,221 INFO L93 Difference]: Finished difference Result 346 states and 374 transitions. [2022-12-14 13:08:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-12-14 13:08:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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 108 [2022-12-14 13:08:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:03,222 INFO L225 Difference]: With dead ends: 346 [2022-12-14 13:08:03,222 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 13:08:03,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16971 ImplicationChecksByTransitivity, 117.5s TimeCoverageRelationStatistics Valid=7292, Invalid=62574, Unknown=94, NotChecked=0, Total=69960 [2022-12-14 13:08:03,226 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 348 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 5461 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 5478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5461 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:03,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1539 Invalid, 5478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5461 Invalid, 6 Unknown, 0 Unchecked, 13.7s Time] [2022-12-14 13:08:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 13:08:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-12-14 13:08:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 155 states have internal predecessors, (179), 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) [2022-12-14 13:08:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2022-12-14 13:08:03,359 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 108 [2022-12-14 13:08:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:03,360 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2022-12-14 13:08:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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) [2022-12-14 13:08:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2022-12-14 13:08:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 13:08:03,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:03,360 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:08:03,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-14 13:08:03,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 13:08:03,561 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash 463419499, now seen corresponding path program 51 times [2022-12-14 13:08:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:03,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059560189] [2022-12-14 13:08:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:03,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 2 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:05,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:05,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059560189] [2022-12-14 13:08:05,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059560189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562886497] [2022-12-14 13:08:05,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:08:05,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:05,466 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:05,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 13:08:07,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:08:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 129 conjunts are in the unsatisfiable core [2022-12-14 13:08:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:08,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:08:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:08,580 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:08:08,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:08,656 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:08:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:08,733 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:08:10,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:08:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 6 proven. 1145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:10,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:18,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 13:08:18,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1218 treesize of output 1202 [2022-12-14 13:08:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 2 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:21,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562886497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353645957] [2022-12-14 13:08:21,243 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:21,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:21,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:21,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:21,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:21,269 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:08:21,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:08:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:21,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:08:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:21,294 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:08:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:21,342 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:08:21,342 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 243 [2022-12-14 13:08:21,371 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:08:21,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:22,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44244#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:08:22,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:22,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:22,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 140 [2022-12-14 13:08:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495037344] [2022-12-14 13:08:22,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-12-14 13:08:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-12-14 13:08:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=21201, Unknown=3, NotChecked=0, Total=21756 [2022-12-14 13:08:22,634 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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) [2022-12-14 13:08:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:28,435 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2022-12-14 13:08:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 13:08:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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 112 [2022-12-14 13:08:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:28,436 INFO L225 Difference]: With dead ends: 163 [2022-12-14 13:08:28,436 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 13:08:28,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8660 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1401, Invalid=36038, Unknown=3, NotChecked=0, Total=37442 [2022-12-14 13:08:28,438 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 6157 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 6179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:28,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1391 Invalid, 6179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6157 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 13:08:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 13:08:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-12-14 13:08:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 158 states have internal predecessors, (182), 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) [2022-12-14 13:08:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2022-12-14 13:08:28,583 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 112 [2022-12-14 13:08:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:28,583 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2022-12-14 13:08:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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) [2022-12-14 13:08:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2022-12-14 13:08:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:08:28,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:28,583 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 21, 20, 20, 1, 1, 1, 1, 1] [2022-12-14 13:08:28,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 13:08:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:28,784 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1710558312, now seen corresponding path program 52 times [2022-12-14 13:08:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332880599] [2022-12-14 13:08:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:30,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:30,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332880599] [2022-12-14 13:08:30,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332880599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:30,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120047089] [2022-12-14 13:08:30,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:08:30,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:30,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:30,931 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:30,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 13:08:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-14 13:08:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:32,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:08:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,700 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:08:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,779 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:08:34,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:08:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 2 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:34,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:36,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:08:36,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2022-12-14 13:08:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:38,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120047089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263930607] [2022-12-14 13:08:38,387 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:38,387 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:38,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:38,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:38,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:38,419 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:08:38,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:08:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:38,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:08:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:38,447 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:08:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:38,520 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:08:38,520 INFO L350 Elim1Store]: Elim1 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 238 treesize of output 240 [2022-12-14 13:08:38,595 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:08:38,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:40,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45628#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:08:40,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:40,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:40,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 141 [2022-12-14 13:08:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849334876] [2022-12-14 13:08:40,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:40,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-12-14 13:08:40,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-12-14 13:08:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=21523, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 13:08:40,053 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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) [2022-12-14 13:08:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:45,969 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2022-12-14 13:08:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 13:08:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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 115 [2022-12-14 13:08:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:45,969 INFO L225 Difference]: With dead ends: 166 [2022-12-14 13:08:45,969 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 13:08:45,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8445 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1215, Invalid=36227, Unknown=0, NotChecked=0, Total=37442 [2022-12-14 13:08:45,971 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 325 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 7845 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 7866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:45,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1926 Invalid, 7866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7845 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 13:08:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 13:08:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-12-14 13:08:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 161 states have internal predecessors, (185), 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) [2022-12-14 13:08:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2022-12-14 13:08:46,109 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 115 [2022-12-14 13:08:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:46,109 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2022-12-14 13:08:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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) [2022-12-14 13:08:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2022-12-14 13:08:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 13:08:46,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:46,110 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 22, 21, 21, 1, 1, 1, 1, 1] [2022-12-14 13:08:46,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 13:08:46,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-14 13:08:46,311 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:46,312 INFO L85 PathProgramCache]: Analyzing trace with hash -539141301, now seen corresponding path program 53 times [2022-12-14 13:08:46,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:46,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272294010] [2022-12-14 13:08:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:46,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:48,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272294010] [2022-12-14 13:08:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272294010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405713174] [2022-12-14 13:08:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:08:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:48,399 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:48,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 13:08:50,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-12-14 13:08:50,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 131 conjunts are in the unsatisfiable core [2022-12-14 13:08:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:50,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:50,911 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 13:08:50,911 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-12-14 13:08:52,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 13:08:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:52,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:53,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:08:53,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:08:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:55,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405713174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581677777] [2022-12-14 13:08:55,277 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:55,277 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:55,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:55,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:55,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:55,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:55,300 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:08:55,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:08:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:55,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:08:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:55,322 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:08:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:55,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:55,377 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:08:55,377 INFO L350 Elim1Store]: Elim1 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 238 treesize of output 240 [2022-12-14 13:08:55,424 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:08:55,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:56,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47017#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:08:56,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:56,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:56,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2022-12-14 13:08:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064798252] [2022-12-14 13:08:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:56,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 13:08:56,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 13:08:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=16349, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 13:08:56,675 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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) [2022-12-14 13:09:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:04,023 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2022-12-14 13:09:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 13:09:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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 118 [2022-12-14 13:09:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:04,024 INFO L225 Difference]: With dead ends: 169 [2022-12-14 13:09:04,024 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 13:09:04,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5930 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=994, Invalid=30868, Unknown=0, NotChecked=0, Total=31862 [2022-12-14 13:09:04,025 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 266 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 6895 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 6922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:04,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1661 Invalid, 6922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6895 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 13:09:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 13:09:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-12-14 13:09:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.146341463414634) internal successors, (188), 164 states have internal predecessors, (188), 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) [2022-12-14 13:09:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-12-14 13:09:04,168 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 118 [2022-12-14 13:09:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:04,168 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-12-14 13:09:04,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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) [2022-12-14 13:09:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-12-14 13:09:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 13:09:04,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:04,168 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 23, 22, 22, 1, 1, 1, 1, 1] [2022-12-14 13:09:04,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 13:09:04,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:04,369 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1624341896, now seen corresponding path program 54 times [2022-12-14 13:09:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:04,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22000420] [2022-12-14 13:09:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:06,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22000420] [2022-12-14 13:09:06,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22000420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289815761] [2022-12-14 13:09:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:09:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:06,670 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:06,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 13:09:07,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:09:07,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-14 13:09:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:09:10,655 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-14 13:09:10,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-14 13:09:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 694 proven. 643 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:10,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:14,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-12-14 13:09:14,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-14 13:09:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 693 proven. 644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289815761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854692710] [2022-12-14 13:09:17,104 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:09:17,104 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:17,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:17,104 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:17,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:17,131 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:09:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:09:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:17,159 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:09:17,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:09:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:17,180 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 33 [2022-12-14 13:09:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:17,251 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:09:17,252 INFO L350 Elim1Store]: Elim1 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 241 treesize of output 237 [2022-12-14 13:09:17,279 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:09:17,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:18,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48445#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:09:18,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:18,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:09:18,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 127 [2022-12-14 13:09:18,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487187830] [2022-12-14 13:09:18,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-12-14 13:09:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-12-14 13:09:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1792, Invalid=16297, Unknown=1, NotChecked=0, Total=18090 [2022-12-14 13:09:18,645 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 128 states, 128 states have (on average 2.4765625) internal successors, (317), 127 states have internal predecessors, (317), 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) [2022-12-14 13:09:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:26,302 INFO L93 Difference]: Finished difference Result 238 states and 261 transitions. [2022-12-14 13:09:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 13:09:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.4765625) internal successors, (317), 127 states have internal predecessors, (317), 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 121 [2022-12-14 13:09:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:26,303 INFO L225 Difference]: With dead ends: 238 [2022-12-14 13:09:26,303 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 13:09:26,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6370 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=3397, Invalid=29908, Unknown=1, NotChecked=0, Total=33306 [2022-12-14 13:09:26,305 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 123 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:26,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 138 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 13:09:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 13:09:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-12-14 13:09:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 164 states have internal predecessors, (187), 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) [2022-12-14 13:09:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2022-12-14 13:09:26,453 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 121 [2022-12-14 13:09:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:26,453 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2022-12-14 13:09:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.4765625) internal successors, (317), 127 states have internal predecessors, (317), 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) [2022-12-14 13:09:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2022-12-14 13:09:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 13:09:26,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:26,454 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 23, 22, 22, 1, 1, 1, 1, 1] [2022-12-14 13:09:26,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 13:09:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:26,655 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1661721903, now seen corresponding path program 55 times [2022-12-14 13:09:26,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383437608] [2022-12-14 13:09:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:26,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:29,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383437608] [2022-12-14 13:09:29,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383437608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342271161] [2022-12-14 13:09:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:09:29,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:29,299 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 13:09:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-14 13:09:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:31,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:09:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:31,293 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:09:33,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:09:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:33,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:09:35,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:09:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342271161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963932533] [2022-12-14 13:09:38,176 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:09:38,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:38,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:38,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:38,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,202 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:09:38,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:09:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,228 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:09:38,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:09:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,242 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 32 [2022-12-14 13:09:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:38,305 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-12-14 13:09:38,305 INFO L350 Elim1Store]: Elim1 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 253 treesize of output 259 [2022-12-14 13:09:38,351 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:09:38,423 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:39,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49998#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:09:39,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:39,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:09:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2022-12-14 13:09:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360613755] [2022-12-14 13:09:39,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-12-14 13:09:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-12-14 13:09:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=24258, Unknown=0, NotChecked=0, Total=24806 [2022-12-14 13:09:39,849 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 151 states, 151 states have (on average 2.423841059602649) internal successors, (366), 150 states have internal predecessors, (366), 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) [2022-12-14 13:09:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:46,648 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2022-12-14 13:09:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 13:09:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.423841059602649) internal successors, (366), 150 states have internal predecessors, (366), 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 123 [2022-12-14 13:09:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:46,649 INFO L225 Difference]: With dead ends: 172 [2022-12-14 13:09:46,650 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 13:09:46,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9492 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1152, Invalid=41490, Unknown=0, NotChecked=0, Total=42642 [2022-12-14 13:09:46,652 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 8718 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 8742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 8718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:46,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 2212 Invalid, 8742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 8718 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 13:09:46,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 13:09:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-12-14 13:09:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 167 states have internal predecessors, (190), 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) [2022-12-14 13:09:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2022-12-14 13:09:46,813 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 123 [2022-12-14 13:09:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:46,813 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2022-12-14 13:09:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.423841059602649) internal successors, (366), 150 states have internal predecessors, (366), 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) [2022-12-14 13:09:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2022-12-14 13:09:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:09:46,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:46,814 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 23, 23, 1, 1, 1, 1, 1] [2022-12-14 13:09:46,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 13:09:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:47,014 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 569311524, now seen corresponding path program 56 times [2022-12-14 13:09:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750826096] [2022-12-14 13:09:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 0 proven. 1455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:49,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750826096] [2022-12-14 13:09:49,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750826096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011229556] [2022-12-14 13:09:49,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:09:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:49,343 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:49,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 13:09:53,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 13:09:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 13:09:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:09:54,241 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-12-14 13:09:54,311 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-12-14 13:09:54,383 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 13:10:02,250 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2022-12-14 13:10:02,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-12-14 13:10:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 731 proven. 724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:10:02,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:21,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-12-14 13:10:21,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:10:21,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3191 treesize of output 3139 [2022-12-14 13:10:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 570 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:10:23,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011229556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:10:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287675955] [2022-12-14 13:10:23,236 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:10:23,236 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:10:23,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:10:23,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:10:23,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:10:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:23,256 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:10:23,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:10:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:23,278 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:10:23,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:10:23,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:23,296 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:10:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:23,347 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:10:23,347 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 243 [2022-12-14 13:10:23,389 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:10:23,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:10:24,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51473#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:10:24,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:10:24,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:10:24,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 55, 54] total 136 [2022-12-14 13:10:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444661404] [2022-12-14 13:10:24,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:10:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-12-14 13:10:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:10:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-12-14 13:10:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1904, Invalid=18681, Unknown=7, NotChecked=0, Total=20592 [2022-12-14 13:10:24,908 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 137 states, 137 states have (on average 2.4160583941605838) internal successors, (331), 136 states have internal predecessors, (331), 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) [2022-12-14 13:10:26,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:29,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:31,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:35,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:36,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:11:56,485 INFO L93 Difference]: Finished difference Result 318 states and 341 transitions. [2022-12-14 13:11:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 13:11:56,486 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.4160583941605838) internal successors, (331), 136 states have internal predecessors, (331), 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 126 [2022-12-14 13:11:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:11:56,486 INFO L225 Difference]: With dead ends: 318 [2022-12-14 13:11:56,487 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 13:11:56,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 263 SyntacticMatches, 23 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17180 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=8705, Invalid=75664, Unknown=21, NotChecked=0, Total=84390 [2022-12-14 13:11:56,490 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 175 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 5176 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 5196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5176 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:11:56,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1005 Invalid, 5196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5176 Invalid, 5 Unknown, 0 Unchecked, 15.1s Time] [2022-12-14 13:11:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 13:11:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-12-14 13:11:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.125748502994012) internal successors, (188), 167 states have internal predecessors, (188), 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) [2022-12-14 13:11:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 188 transitions. [2022-12-14 13:11:56,647 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 188 transitions. Word has length 126 [2022-12-14 13:11:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:11:56,647 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 188 transitions. [2022-12-14 13:11:56,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.4160583941605838) internal successors, (331), 136 states have internal predecessors, (331), 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) [2022-12-14 13:11:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 188 transitions. [2022-12-14 13:11:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:11:56,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:11:56,648 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 24, 23, 23, 1, 1, 1, 1, 1] [2022-12-14 13:11:56,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 13:11:56,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-14 13:11:56,849 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:11:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:11:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash -379430826, now seen corresponding path program 57 times [2022-12-14 13:11:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:11:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608969072] [2022-12-14 13:11:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:11:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:11:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:11:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:11:59,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:11:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608969072] [2022-12-14 13:11:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608969072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:11:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830890121] [2022-12-14 13:11:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:11:59,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:11:59,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:11:59,313 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:11:59,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 13:12:01,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:12:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-14 13:12:01,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:03,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:12:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:03,201 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:12:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:03,269 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:12:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:12:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 2 proven. 1559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:05,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:08,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 13:12:08,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2022-12-14 13:12:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:10,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830890121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731298950] [2022-12-14 13:12:10,594 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:12:10,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:12:10,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:12:10,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:12:10,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:12:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:10,616 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:12:10,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:12:10,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:10,641 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:12:10,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:12:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:10,658 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 37 [2022-12-14 13:12:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:10,706 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 13:12:10,706 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 243 [2022-12-14 13:12:10,735 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:12:10,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:12:12,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53388#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:12:12,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:12:12,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:12:12,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 161 [2022-12-14 13:12:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918535311] [2022-12-14 13:12:12,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-12-14 13:12:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:12:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-12-14 13:12:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=27785, Unknown=0, NotChecked=0, Total=28392 [2022-12-14 13:12:12,355 INFO L87 Difference]: Start difference. First operand 168 states and 188 transitions. Second operand has 162 states, 162 states have (on average 2.388888888888889) internal successors, (387), 161 states have internal predecessors, (387), 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) [2022-12-14 13:12:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:19,268 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2022-12-14 13:12:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 13:12:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.388888888888889) internal successors, (387), 161 states have internal predecessors, (387), 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 130 [2022-12-14 13:12:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:19,268 INFO L225 Difference]: With dead ends: 175 [2022-12-14 13:12:19,268 INFO L226 Difference]: Without dead ends: 173 [2022-12-14 13:12:19,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11284 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1444, Invalid=48062, Unknown=0, NotChecked=0, Total=49506 [2022-12-14 13:12:19,270 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 280 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 9477 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 9503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 9477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:19,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 2215 Invalid, 9503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 9477 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 13:12:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-14 13:12:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-12-14 13:12:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 170 states have internal predecessors, (191), 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) [2022-12-14 13:12:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2022-12-14 13:12:19,429 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 130 [2022-12-14 13:12:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:19,429 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2022-12-14 13:12:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.388888888888889) internal successors, (387), 161 states have internal predecessors, (387), 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) [2022-12-14 13:12:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2022-12-14 13:12:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 13:12:19,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:19,430 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 25, 24, 24, 1, 1, 1, 1, 1] [2022-12-14 13:12:19,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-14 13:12:19,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-14 13:12:19,631 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:12:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 735338653, now seen corresponding path program 58 times [2022-12-14 13:12:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:12:19,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662569195] [2022-12-14 13:12:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:19,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:12:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 0 proven. 1632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:22,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:12:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662569195] [2022-12-14 13:12:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662569195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734516335] [2022-12-14 13:12:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:12:22,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:22,104 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:22,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 13:12:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 143 conjunts are in the unsatisfiable core [2022-12-14 13:12:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:23,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:12:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:24,073 INFO L350 Elim1Store]: Elim1 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 24 [2022-12-14 13:12:26,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:12:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 0 proven. 1632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:26,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:28,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 13:12:28,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-12-14 13:12:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 0 proven. 1632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:30,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734516335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787012844] [2022-12-14 13:12:30,904 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:12:30,904 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:12:30,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:12:30,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:12:30,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:12:30,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:30,930 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:12:30,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:12:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:30,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:12:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:30,965 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 28 [2022-12-14 13:12:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:31,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:31,024 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-12-14 13:12:31,024 INFO L350 Elim1Store]: Elim1 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 234 treesize of output 236 [2022-12-14 13:12:31,061 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 16 [2022-12-14 13:12:31,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:12:32,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54949#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 13:12:32,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:12:32,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:12:32,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 162 [2022-12-14 13:12:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876237679] [2022-12-14 13:12:32,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:32,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-12-14 13:12:32,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:12:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-12-14 13:12:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=28140, Unknown=0, NotChecked=0, Total=28730 [2022-12-14 13:12:32,411 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 163 states, 163 states have (on average 2.4294478527607364) internal successors, (396), 162 states have internal predecessors, (396), 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) [2022-12-14 13:12:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:39,218 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-12-14 13:12:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-14 13:12:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.4294478527607364) internal successors, (396), 162 states have internal predecessors, (396), 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 133 [2022-12-14 13:12:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:39,219 INFO L225 Difference]: With dead ends: 178 [2022-12-14 13:12:39,219 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 13:12:39,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11006 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1244, Invalid=48262, Unknown=0, NotChecked=0, Total=49506 [2022-12-14 13:12:39,221 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 219 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 9914 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 9941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 9914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:39,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 2604 Invalid, 9941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 9914 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 13:12:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 13:12:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2022-12-14 13:12:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1213872832369942) internal successors, (194), 173 states have internal predecessors, (194), 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) [2022-12-14 13:12:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 194 transitions. [2022-12-14 13:12:39,386 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 194 transitions. Word has length 133 [2022-12-14 13:12:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:39,386 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 194 transitions. [2022-12-14 13:12:39,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.4294478527607364) internal successors, (396), 162 states have internal predecessors, (396), 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) [2022-12-14 13:12:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 194 transitions. [2022-12-14 13:12:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:12:39,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:39,387 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 26, 25, 25, 1, 1, 1, 1, 1] [2022-12-14 13:12:39,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 13:12:39,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:39,588 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:12:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2145754870, now seen corresponding path program 59 times [2022-12-14 13:12:39,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:12:39,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577277595] [2022-12-14 13:12:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:12:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 1706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:42,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:12:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577277595] [2022-12-14 13:12:42,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577277595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544799144] [2022-12-14 13:12:42,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:12:42,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:42,154 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:42,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa9127b-ef49-487e-9026-ba53f6534329/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 13:12:47,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-12-14 13:12:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 13:12:47,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:48,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:12:48,693 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-12-14 13:12:48,769 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 35 treesize of output 34 [2022-12-14 13:12:48,843 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 13:12:59,070 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2022-12-14 13:12:59,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-12-14 13:12:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 872 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:59,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:30,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-12-14 13:13:30,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:13:30,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34035 treesize of output 33491