./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/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_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/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_4fc7b89b-c299-41b0-acaf-a532b726c6f5/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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- 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 04:54:40,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:54:40,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:54:40,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:54:40,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:54:40,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:54:40,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:54:40,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:54:40,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:54:40,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:54:40,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:54:40,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:54:40,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:54:40,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:54:40,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:54:40,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:54:40,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:54:40,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:54:40,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:54:40,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:54:40,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:54:40,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:54:40,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:54:40,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:54:40,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:54:40,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:54:40,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:54:40,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:54:40,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:54:40,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:54:40,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:54:40,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:54:40,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:54:40,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:54:40,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:54:40,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:54:40,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:54:40,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:54:40,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:54:40,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:54:40,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:54:40,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:54:40,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:54:40,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:54:40,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:54:40,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:54:40,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:54:40,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:54:40,541 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:54:40,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:54:40,541 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:54:40,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:54:40,542 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:54:40,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:54:40,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:54:40,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:54:40,542 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:54:40,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:54:40,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:54:40,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:54:40,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:54:40,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:54:40,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:54:40,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:54:40,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:54:40,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:54:40,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:54:40,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:54:40,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:54:40,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:54:40,546 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:54:40,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:54:40,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:54:40,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:54:40,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:54:40,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:54:40,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:54:40,547 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_4fc7b89b-c299-41b0-acaf-a532b726c6f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-12-14 04:54:40,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:54:40,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:54:40,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:54:40,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:54:40,734 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:54:40,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-tiling/pnr4.c [2022-12-14 04:54:43,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:54:43,437 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:54:43,437 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/sv-benchmarks/c/array-tiling/pnr4.c [2022-12-14 04:54:43,442 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/data/bc9a3a296/b9835d143bcf4eccb31cb4457f79ebdc/FLAGa0b550710 [2022-12-14 04:54:43,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/data/bc9a3a296/b9835d143bcf4eccb31cb4457f79ebdc [2022-12-14 04:54:43,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:54:43,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:54:43,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:54:43,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:54:43,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:54:43,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:54:43" (1/1) ... [2022-12-14 04:54:43,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666148cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:43, skipping insertion in model container [2022-12-14 04:54:43,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:54:43" (1/1) ... [2022-12-14 04:54:43,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:54:43,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:54:43,973 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_4fc7b89b-c299-41b0-acaf-a532b726c6f5/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-12-14 04:54:43,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:54:43,994 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:54:44,003 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_4fc7b89b-c299-41b0-acaf-a532b726c6f5/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-12-14 04:54:44,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:54:44,018 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:54:44,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44 WrapperNode [2022-12-14 04:54:44,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:54:44,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:54:44,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:54:44,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:54:44,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,043 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-12-14 04:54:44,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:54:44,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:54:44,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:54:44,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:54:44,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:54:44,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:54:44,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:54:44,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:54:44,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (1/1) ... [2022-12-14 04:54:44,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:54:44,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:44,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:54:44,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-12-14 04:54:44,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:54:44,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:54:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 04:54:44,171 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:54:44,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:54:44,290 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:54:44,331 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:54:44,331 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 04:54:44,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:54:44 BoogieIcfgContainer [2022-12-14 04:54:44,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:54:44,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:54:44,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:54:44,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:54:44,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:54:43" (1/3) ... [2022-12-14 04:54:44,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75adc83a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:54:44, skipping insertion in model container [2022-12-14 04:54:44,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:44" (2/3) ... [2022-12-14 04:54:44,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75adc83a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:54:44, skipping insertion in model container [2022-12-14 04:54:44,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:54:44" (3/3) ... [2022-12-14 04:54:44,339 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-12-14 04:54:44,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:54:44,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:54:44,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:54:44,398 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;@6e32648b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:54:44,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:54:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:54:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 04:54:44,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:44,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:44,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 747918148, now seen corresponding path program 1 times [2022-12-14 04:54:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:44,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168958795] [2022-12-14 04:54:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:44,739 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 04:54:44,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168958795] [2022-12-14 04:54:44,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168958795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:44,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:54:44,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:54:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055682026] [2022-12-14 04:54:44,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:54:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:54:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:54:44,782 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 04:54:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:44,889 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-12-14 04:54:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:54:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 04:54:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:44,896 INFO L225 Difference]: With dead ends: 42 [2022-12-14 04:54:44,896 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 04:54:44,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 04:54:44,902 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:54:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 04:54:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2022-12-14 04:54:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:54:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-12-14 04:54:44,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 7 [2022-12-14 04:54:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-12-14 04:54:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 04:54:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-12-14 04:54:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 04:54:44,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:44,946 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:44,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:54:44,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1318552209, now seen corresponding path program 1 times [2022-12-14 04:54:44,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555777340] [2022-12-14 04:54:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:45,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555777340] [2022-12-14 04:54:45,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555777340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78121625] [2022-12-14 04:54:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:45,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:45,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:45,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:54:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 04:54:45,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:46,106 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 04:54:46,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:46,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:54:46,204 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 42 treesize of output 30 [2022-12-14 04:54:46,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:46,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:54:46,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:46,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 105 [2022-12-14 04:54:46,344 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 64 treesize of output 50 [2022-12-14 04:54:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2022-12-14 04:54:46,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2022-12-14 04:54:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:46,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 83 [2022-12-14 04:54:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2022-12-14 04:54:46,446 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 52 treesize of output 36 [2022-12-14 04:54:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:46,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-12-14 04:54:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:46,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:46,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:46,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:54:46,735 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 49 treesize of output 36 [2022-12-14 04:54:46,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:46,743 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 36 treesize of output 37 [2022-12-14 04:54:46,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:46,763 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 46 treesize of output 39 [2022-12-14 04:54:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78121625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716624766] [2022-12-14 04:54:46,872 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 04:54:46,872 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:46,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:46,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:46,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:46,951 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:54:46,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:54:46,964 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 04:54:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:54:47,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 143 treesize of output 115 [2022-12-14 04:54:47,130 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 10 treesize of output 3 [2022-12-14 04:54:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:47,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:47,505 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:54:47,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 800 treesize of output 823 [2022-12-14 04:54:47,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:47,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 629 treesize of output 614 [2022-12-14 04:54:47,704 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:54:47,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-12-14 04:54:47,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:54:49,907 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 04:54:49,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:49,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:54:49,987 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 42 treesize of output 30 [2022-12-14 04:54:49,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:50,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:54:50,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:50,371 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 16 treesize of output 12 [2022-12-14 04:54:50,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:50,438 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 04:54:50,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:50,600 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 04:54:50,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:50,772 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 04:54:50,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:50,932 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 04:54:50,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:51,004 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 04:54:51,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:54:51,073 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 42 treesize of output 30 [2022-12-14 04:54:51,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:51,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:54:51,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:51,357 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 04:54:51,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:54:51,432 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 42 treesize of output 30 [2022-12-14 04:54:51,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:51,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:54:51,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:51,732 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 04:54:51,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:54:51,795 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 42 treesize of output 30 [2022-12-14 04:54:51,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:51,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:54:52,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:52,086 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 04:54:52,142 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 04:54:52,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:52,277 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:54:52,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:53,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '273#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 04:54:53,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:53,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:53,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-12-14 04:54:53,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197543930] [2022-12-14 04:54:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:54:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:54:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 04:54:53,268 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 04:54:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:53,619 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-12-14 04:54:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 04:54:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 24 [2022-12-14 04:54:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:53,620 INFO L225 Difference]: With dead ends: 37 [2022-12-14 04:54:53,620 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 04:54:53,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 04:54:53,621 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:53,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 63 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:54:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 04:54:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-12-14 04:54:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:54:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-14 04:54:53,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2022-12-14 04:54:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:53,626 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-14 04:54:53,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 04:54:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-14 04:54:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 04:54:53,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:53,627 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:53,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:54:53,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:53,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1124575919, now seen corresponding path program 1 times [2022-12-14 04:54:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454270341] [2022-12-14 04:54:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:54,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454270341] [2022-12-14 04:54:54,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454270341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768075725] [2022-12-14 04:54:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:54,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:54,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:54:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 04:54:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:54,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 04:54:54,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 04:54:54,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:54:54,421 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 33 treesize of output 21 [2022-12-14 04:54:54,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 04:54:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:54,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:54,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:54,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:54:54,631 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 11 treesize of output 4 [2022-12-14 04:54:54,638 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:54:54,639 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 19 treesize of output 13 [2022-12-14 04:54:54,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:54,645 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 30 treesize of output 25 [2022-12-14 04:54:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:54:54,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768075725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:54,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320818490] [2022-12-14 04:54:54,695 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:54:54,695 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:54,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:54,695 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:54,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:54,742 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:54:54,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:54:54,753 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 04:54:54,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:54:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:54,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 126 treesize of output 104 [2022-12-14 04:54:54,867 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 10 treesize of output 3 [2022-12-14 04:54:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:55,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:55,164 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:54:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 856 treesize of output 879 [2022-12-14 04:54:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:55,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 667 treesize of output 646 [2022-12-14 04:54:55,432 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:54:55,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 04:54:55,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:57,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:57,332 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 04:54:57,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:54:57,398 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 42 treesize of output 30 [2022-12-14 04:54:57,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:57,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:54:57,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:57,717 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 04:54:57,760 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 04:54:57,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:57,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:57,895 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 16 treesize of output 12 [2022-12-14 04:54:58,039 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 04:54:58,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:58,191 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 04:54:58,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:58,245 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 16 treesize of output 12 [2022-12-14 04:54:58,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:58,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:54:58,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:58,323 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 132 treesize of output 112 [2022-12-14 04:54:58,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:54:58,528 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 04:54:58,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:58,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:54:58,600 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 42 treesize of output 30 [2022-12-14 04:54:58,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:58,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:54:58,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:58,869 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 04:54:58,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:54:58,943 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 42 treesize of output 30 [2022-12-14 04:54:58,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:54:58,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:54:59,228 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 04:54:59,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:59,416 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 04:54:59,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:54:59,543 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:54:59,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:00,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:00,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:00,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:00,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-12-14 04:55:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111286077] [2022-12-14 04:55:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:00,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:55:00,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:55:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:55:00,862 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 04:55:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:01,620 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2022-12-14 04:55:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 04:55:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 30 [2022-12-14 04:55:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:01,622 INFO L225 Difference]: With dead ends: 70 [2022-12-14 04:55:01,622 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 04:55:01,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=403, Invalid=2567, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 04:55:01,623 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:01,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 133 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:55:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 04:55:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 31. [2022-12-14 04:55:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:55:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-14 04:55:01,631 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 30 [2022-12-14 04:55:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:01,631 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-14 04:55:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 04:55:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-14 04:55:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 04:55:01,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:01,632 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:01,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:55:01,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 04:55:01,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1822431249, now seen corresponding path program 2 times [2022-12-14 04:55:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:01,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869333934] [2022-12-14 04:55:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:55:02,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869333934] [2022-12-14 04:55:02,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869333934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84293445] [2022-12-14 04:55:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:55:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:02,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:02,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:55:02,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 04:55:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:55:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:55:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:55:02,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84293445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100780364] [2022-12-14 04:55:02,538 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:02,538 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:02,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:02,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:02,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:02,593 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:02,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:02,603 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 04:55:02,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:02,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 111 treesize of output 91 [2022-12-14 04:55:02,703 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 10 treesize of output 3 [2022-12-14 04:55:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:02,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:02,953 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:02,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 849 treesize of output 872 [2022-12-14 04:55:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:02,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:02,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 696 treesize of output 673 [2022-12-14 04:55:03,278 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:03,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-12-14 04:55:03,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:55:04,979 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 04:55:04,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:55:05,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:05,051 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 144 treesize of output 124 [2022-12-14 04:55:05,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:55:05,362 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 04:55:05,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,413 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 04:55:05,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,553 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 04:55:05,691 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 16 treesize of output 12 [2022-12-14 04:55:05,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,825 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 04:55:05,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,874 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 04:55:05,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:05,945 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 42 treesize of output 30 [2022-12-14 04:55:05,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:05,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:06,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:06,176 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 04:55:06,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:55:06,247 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 42 treesize of output 30 [2022-12-14 04:55:06,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:06,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:55:06,534 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 04:55:06,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:06,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:06,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:06,621 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 132 treesize of output 112 [2022-12-14 04:55:06,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:06,872 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 16 treesize of output 12 [2022-12-14 04:55:06,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:07,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:07,063 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 04:55:07,185 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:55:07,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:08,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1022#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:08,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:08,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:08,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2022-12-14 04:55:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602830950] [2022-12-14 04:55:08,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 04:55:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 04:55:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 04:55:08,489 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 04:55:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:08,709 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-12-14 04:55:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 04:55:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 36 [2022-12-14 04:55:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:08,710 INFO L225 Difference]: With dead ends: 66 [2022-12-14 04:55:08,710 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 04:55:08,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 04:55:08,711 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:08,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 43 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:55:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 04:55:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-12-14 04:55:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 04:55:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-12-14 04:55:08,719 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 36 [2022-12-14 04:55:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:08,720 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-12-14 04:55:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 04:55:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-12-14 04:55:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 04:55:08,722 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:08,722 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:08,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 04:55:08,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:08,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1961813988, now seen corresponding path program 3 times [2022-12-14 04:55:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:08,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423572036] [2022-12-14 04:55:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:09,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423572036] [2022-12-14 04:55:09,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423572036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55423710] [2022-12-14 04:55:09,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:55:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:09,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:09,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:55:09,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:55:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 04:55:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:09,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:09,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:09,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 04:55:09,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:55:09,995 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 30 treesize of output 19 [2022-12-14 04:55:09,998 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 19 treesize of output 12 [2022-12-14 04:55:10,008 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 31 treesize of output 17 [2022-12-14 04:55:10,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:55:10,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:10,065 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 55 treesize of output 41 [2022-12-14 04:55:10,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:55:10,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:10,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 04:55:10,160 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 58 treesize of output 42 [2022-12-14 04:55:10,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-12-14 04:55:10,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-12-14 04:55:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:10,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:10,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:10,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:55:10,855 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 53 treesize of output 40 [2022-12-14 04:55:10,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:10,860 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 40 treesize of output 39 [2022-12-14 04:55:10,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:10,870 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 50 treesize of output 39 [2022-12-14 04:55:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:11,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55423710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073791645] [2022-12-14 04:55:11,022 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:11,022 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:11,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:11,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:11,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:11,072 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 04:55:11,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-12-14 04:55:11,112 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:11,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:11,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:11,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 148 treesize of output 122 [2022-12-14 04:55:11,237 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 10 treesize of output 3 [2022-12-14 04:55:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:11,519 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:11,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 848 treesize of output 871 [2022-12-14 04:55:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:11,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 623 treesize of output 606 [2022-12-14 04:55:11,838 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:11,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 04:55:11,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:13,479 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 04:55:13,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:13,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:55:13,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:13,557 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 144 treesize of output 124 [2022-12-14 04:55:13,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:55:13,856 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 04:55:13,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:13,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:13,920 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 16 treesize of output 12 [2022-12-14 04:55:14,068 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 16 treesize of output 12 [2022-12-14 04:55:14,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:14,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:14,226 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 04:55:14,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:14,395 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 04:55:14,446 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 04:55:14,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:14,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:14,514 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 42 treesize of output 30 [2022-12-14 04:55:14,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:14,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:14,732 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 04:55:14,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:14,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:55:14,799 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 42 treesize of output 30 [2022-12-14 04:55:14,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:14,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:55:15,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:15,033 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 04:55:15,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:15,104 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 42 treesize of output 30 [2022-12-14 04:55:15,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:15,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:15,314 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 04:55:15,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:15,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:15,504 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 16 treesize of output 12 [2022-12-14 04:55:15,618 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:55:15,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:17,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1546#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:17,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:17,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:17,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 36 [2022-12-14 04:55:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454616377] [2022-12-14 04:55:17,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 04:55:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 04:55:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 04:55:17,269 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 04:55:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:19,864 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2022-12-14 04:55:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:55:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 53 [2022-12-14 04:55:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:19,866 INFO L225 Difference]: With dead ends: 124 [2022-12-14 04:55:19,867 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 04:55:19,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1061, Invalid=7311, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 04:55:19,869 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 390 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:19,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 181 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 04:55:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 04:55:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2022-12-14 04:55:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 04:55:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-12-14 04:55:19,887 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 53 [2022-12-14 04:55:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:19,887 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-12-14 04:55:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 04:55:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-12-14 04:55:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 04:55:19,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:19,888 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:19,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:55:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:20,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1508953904, now seen corresponding path program 4 times [2022-12-14 04:55:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:20,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746359060] [2022-12-14 04:55:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:20,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:20,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746359060] [2022-12-14 04:55:20,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746359060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:20,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222934258] [2022-12-14 04:55:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:55:20,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:20,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:20,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:20,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:55:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 04:55:20,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:20,888 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 04:55:20,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:55:20,938 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 04:55:20,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:55:20,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:20,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 04:55:20,996 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 58 treesize of output 42 [2022-12-14 04:55:21,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-12-14 04:55:21,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-12-14 04:55:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:21,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:21,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:21,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:55:21,480 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 58 treesize of output 42 [2022-12-14 04:55:21,483 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 11 treesize of output 4 [2022-12-14 04:55:21,488 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:55:21,488 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 19 treesize of output 13 [2022-12-14 04:55:21,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:21,492 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 30 treesize of output 25 [2022-12-14 04:55:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222934258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427240471] [2022-12-14 04:55:21,569 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:21,570 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:21,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:21,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:21,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:21,615 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:21,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:21,627 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 04:55:21,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:21,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 129 treesize of output 105 [2022-12-14 04:55:21,729 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 10 treesize of output 3 [2022-12-14 04:55:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:22,004 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:22,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 830 treesize of output 853 [2022-12-14 04:55:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:22,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 04:55:22,326 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:22,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 04:55:22,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:24,172 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 04:55:24,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:24,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:55:24,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:24,265 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 144 treesize of output 124 [2022-12-14 04:55:24,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:55:24,591 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 04:55:24,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:24,644 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 04:55:24,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:24,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:24,807 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 04:55:24,961 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 04:55:24,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:25,118 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 04:55:25,177 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 04:55:25,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:25,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:25,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:25,263 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 132 treesize of output 112 [2022-12-14 04:55:25,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:25,510 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 04:55:25,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:25,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:55:25,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:25,594 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 174 treesize of output 154 [2022-12-14 04:55:25,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:55:25,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:25,813 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 16 treesize of output 12 [2022-12-14 04:55:25,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:25,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:25,901 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 132 treesize of output 112 [2022-12-14 04:55:25,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:26,096 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 04:55:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:26,253 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 16 treesize of output 12 [2022-12-14 04:55:26,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:26,356 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:55:26,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:27,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2256#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:27,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:27,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 31 [2022-12-14 04:55:27,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703399227] [2022-12-14 04:55:27,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:27,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 04:55:27,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 04:55:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 04:55:27,984 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 04:55:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:30,503 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2022-12-14 04:55:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 04:55:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 56 [2022-12-14 04:55:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:30,505 INFO L225 Difference]: With dead ends: 147 [2022-12-14 04:55:30,505 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 04:55:30,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1077, Invalid=8235, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 04:55:30,506 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 333 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:30,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 313 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 04:55:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 04:55:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 52. [2022-12-14 04:55:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 04:55:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-12-14 04:55:30,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 56 [2022-12-14 04:55:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:30,521 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-12-14 04:55:30,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 04:55:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-12-14 04:55:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 04:55:30,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:30,522 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:30,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 04:55:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:30,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash -830269212, now seen corresponding path program 5 times [2022-12-14 04:55:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:30,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459766863] [2022-12-14 04:55:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:31,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459766863] [2022-12-14 04:55:31,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459766863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:31,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305980890] [2022-12-14 04:55:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:55:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:31,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:31,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:55:31,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 04:55:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:55:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:55:32,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305980890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:32,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116559619] [2022-12-14 04:55:32,065 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:32,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:32,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:32,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:32,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:32,100 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:32,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:32,107 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 04:55:32,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:32,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 107 treesize of output 87 [2022-12-14 04:55:32,217 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 10 treesize of output 3 [2022-12-14 04:55:32,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:32,519 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:32,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 838 treesize of output 861 [2022-12-14 04:55:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:32,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:32,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 703 treesize of output 680 [2022-12-14 04:55:32,676 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:32,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 04:55:32,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:34,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:34,523 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 04:55:34,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:55:34,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:34,603 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 144 treesize of output 124 [2022-12-14 04:55:34,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:55:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:34,923 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 16 treesize of output 12 [2022-12-14 04:55:34,971 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 04:55:34,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,109 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 04:55:35,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,276 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 04:55:35,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,438 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 04:55:35,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,495 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 04:55:35,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:35,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:35,575 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 132 treesize of output 112 [2022-12-14 04:55:35,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:35,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:35,842 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 16 treesize of output 12 [2022-12-14 04:55:35,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:55:35,921 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 42 treesize of output 30 [2022-12-14 04:55:35,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:35,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:55:36,211 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 04:55:36,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:36,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:36,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:36,304 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 132 treesize of output 112 [2022-12-14 04:55:36,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:36,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:36,533 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 04:55:36,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:36,718 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 16 treesize of output 12 [2022-12-14 04:55:36,845 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:55:36,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:38,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3084#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:38,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:38,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:38,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 41 [2022-12-14 04:55:38,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186882307] [2022-12-14 04:55:38,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:38,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 04:55:38,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 04:55:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2713, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:55:38,522 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 04:55:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:38,823 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-12-14 04:55:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:55:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 65 [2022-12-14 04:55:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:38,825 INFO L225 Difference]: With dead ends: 99 [2022-12-14 04:55:38,825 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 04:55:38,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=593, Invalid=3313, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 04:55:38,828 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:38,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 88 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:55:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 04:55:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2022-12-14 04:55:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 04:55:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-12-14 04:55:38,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 65 [2022-12-14 04:55:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:38,844 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-12-14 04:55:38,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 04:55:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-12-14 04:55:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 04:55:38,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:38,845 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:38,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:55:39,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 04:55:39,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1040981489, now seen corresponding path program 6 times [2022-12-14 04:55:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:39,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48466086] [2022-12-14 04:55:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:40,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48466086] [2022-12-14 04:55:40,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48466086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153854226] [2022-12-14 04:55:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:55:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:40,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:40,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:55:40,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:55:40,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 04:55:40,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:40,391 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 04:55:40,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:40,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:55:40,470 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 55 treesize of output 41 [2022-12-14 04:55:40,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:55:40,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:40,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:40,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 105 [2022-12-14 04:55:40,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 04:55:40,625 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 76 treesize of output 60 [2022-12-14 04:55:40,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 04:55:40,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:40,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 109 [2022-12-14 04:55:40,710 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 74 treesize of output 56 [2022-12-14 04:55:40,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2022-12-14 04:55:40,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2022-12-14 04:55:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:42,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:42,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:55:42,039 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 58 treesize of output 42 [2022-12-14 04:55:42,045 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:55:42,046 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 19 treesize of output 13 [2022-12-14 04:55:42,051 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 11 treesize of output 4 [2022-12-14 04:55:42,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:42,055 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 30 treesize of output 25 [2022-12-14 04:55:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:42,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153854226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370496331] [2022-12-14 04:55:42,284 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:42,284 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:42,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:42,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:42,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:42,327 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:42,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:42,337 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 04:55:42,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:42,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 140 treesize of output 114 [2022-12-14 04:55:42,461 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 10 treesize of output 3 [2022-12-14 04:55:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:42,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:42,723 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:42,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 826 treesize of output 849 [2022-12-14 04:55:42,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:42,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 637 treesize of output 620 [2022-12-14 04:55:43,033 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:43,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 04:55:43,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:55:44,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:44,797 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 04:55:44,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:55:44,853 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 42 treesize of output 30 [2022-12-14 04:55:44,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:44,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:55:45,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,225 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 04:55:45,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,277 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 04:55:45,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,410 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 04:55:45,536 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 04:55:45,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,683 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 04:55:45,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:45,732 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 04:55:45,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:45,800 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 42 treesize of output 30 [2022-12-14 04:55:45,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:45,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:46,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:46,073 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 04:55:46,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:55:46,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:46,159 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 174 treesize of output 154 [2022-12-14 04:55:46,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:55:46,438 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 04:55:46,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:46,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:55:46,516 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 42 treesize of output 30 [2022-12-14 04:55:46,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:55:46,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:55:46,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:46,790 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 04:55:46,962 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 04:55:46,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:55:47,095 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:55:47,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:48,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3874#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:48,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:48,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:48,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 17] total 50 [2022-12-14 04:55:48,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274745724] [2022-12-14 04:55:48,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 04:55:48,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 04:55:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3944, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 04:55:48,819 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 50 states, 50 states have (on average 2.7) internal successors, (135), 50 states have internal predecessors, (135), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-12-14 04:55:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:56,067 INFO L93 Difference]: Finished difference Result 245 states and 308 transitions. [2022-12-14 04:55:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-14 04:55:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.7) internal successors, (135), 50 states have internal predecessors, (135), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 82 [2022-12-14 04:55:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:56,070 INFO L225 Difference]: With dead ends: 245 [2022-12-14 04:55:56,070 INFO L226 Difference]: Without dead ends: 243 [2022-12-14 04:55:56,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 196 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8146 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2891, Invalid=23841, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 04:55:56,075 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 450 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:56,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 411 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3521 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 04:55:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-14 04:55:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 70. [2022-12-14 04:55:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 04:55:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-12-14 04:55:56,098 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 82 [2022-12-14 04:55:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:56,098 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-12-14 04:55:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.7) internal successors, (135), 50 states have internal predecessors, (135), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-12-14 04:55:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-12-14 04:55:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 04:55:56,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:56,099 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:56,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:55:56,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 04:55:56,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -315072285, now seen corresponding path program 7 times [2022-12-14 04:55:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:56,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280994087] [2022-12-14 04:55:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:56,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280994087] [2022-12-14 04:55:56,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280994087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140075169] [2022-12-14 04:55:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:55:56,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:56,982 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:56,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:55:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 04:55:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:57,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-12-14 04:55:57,293 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 7 treesize of output 3 [2022-12-14 04:55:57,301 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 18 treesize of output 7 [2022-12-14 04:55:57,302 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 7 treesize of output 3 [2022-12-14 04:55:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:57,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:57,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:55:57,829 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 11 treesize of output 4 [2022-12-14 04:55:57,834 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:55:57,835 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 19 treesize of output 13 [2022-12-14 04:55:57,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:57,840 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 30 treesize of output 25 [2022-12-14 04:55:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:55:58,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140075169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613737797] [2022-12-14 04:55:58,019 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:55:58,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:55:58,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:55:58,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:55:58,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:55:58,056 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 04:55:58,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-12-14 04:55:58,090 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:55:58,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:55:58,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:55:58,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 129 treesize of output 105 [2022-12-14 04:55:58,195 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 10 treesize of output 3 [2022-12-14 04:55:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:58,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:58,477 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:55:58,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 830 treesize of output 853 [2022-12-14 04:55:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:58,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:55:58,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 04:55:58,788 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:55:58,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 04:55:58,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:00,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:00,586 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 04:56:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:56:00,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:00,655 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 144 treesize of output 124 [2022-12-14 04:56:00,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:56:00,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:00,988 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 16 treesize of output 12 [2022-12-14 04:56:01,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,035 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 04:56:01,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,165 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 04:56:01,334 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 04:56:01,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,479 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 04:56:01,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,527 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 04:56:01,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:01,591 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 42 treesize of output 30 [2022-12-14 04:56:01,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:01,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:01,856 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 04:56:01,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:01,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:56:01,929 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 42 treesize of output 30 [2022-12-14 04:56:01,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:01,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:56:02,160 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 04:56:02,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:02,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:02,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:02,234 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 132 treesize of output 112 [2022-12-14 04:56:02,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:02,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:02,496 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 04:56:02,682 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 04:56:02,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:02,806 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:56:02,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:04,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5122#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:56:04,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:56:04,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:04,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2022-12-14 04:56:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57550157] [2022-12-14 04:56:04,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:04,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 04:56:04,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 04:56:04,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3197, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 04:56:04,391 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 04:56:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:14,974 INFO L93 Difference]: Finished difference Result 377 states and 458 transitions. [2022-12-14 04:56:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-12-14 04:56:14,974 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 91 [2022-12-14 04:56:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:14,976 INFO L225 Difference]: With dead ends: 377 [2022-12-14 04:56:14,976 INFO L226 Difference]: Without dead ends: 375 [2022-12-14 04:56:14,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17897 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3820, Invalid=47482, Unknown=0, NotChecked=0, Total=51302 [2022-12-14 04:56:14,980 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 593 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 4841 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 6015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 4841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:14,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 630 Invalid, 6015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 4841 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 04:56:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-14 04:56:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 73. [2022-12-14 04:56:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 04:56:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-14 04:56:15,008 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 91 [2022-12-14 04:56:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:15,008 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-14 04:56:15,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 04:56:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-14 04:56:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 04:56:15,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:15,009 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 04:56:15,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:56:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 04:56:15,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1809407119, now seen corresponding path program 8 times [2022-12-14 04:56:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:15,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111081561] [2022-12-14 04:56:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:15,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 188 proven. 64 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:56:15,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111081561] [2022-12-14 04:56:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111081561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420759314] [2022-12-14 04:56:15,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:56:15,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:15,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:15,839 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:15,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:56:17,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 04:56:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:17,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:56:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 222 proven. 30 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:56:17,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 222 proven. 30 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 04:56:18,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420759314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741410051] [2022-12-14 04:56:18,231 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:56:18,231 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:56:18,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:56:18,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:56:18,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:56:18,267 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:56:18,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:56:18,276 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 04:56:18,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:56:18,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 100 treesize of output 82 [2022-12-14 04:56:18,392 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 10 treesize of output 3 [2022-12-14 04:56:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:18,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:18,654 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:56:18,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 853 treesize of output 876 [2022-12-14 04:56:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:18,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:18,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 718 treesize of output 693 [2022-12-14 04:56:18,965 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:56:18,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 492 [2022-12-14 04:56:18,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:56:20,637 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 04:56:20,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:20,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:56:20,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:20,711 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 144 treesize of output 124 [2022-12-14 04:56:20,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:56:21,009 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 04:56:21,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,057 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 04:56:21,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,179 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 04:56:21,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,311 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 04:56:21,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,450 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 04:56:21,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,496 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 04:56:21,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:21,558 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 42 treesize of output 30 [2022-12-14 04:56:21,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:21,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:21,807 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 04:56:21,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:21,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:56:21,883 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 42 treesize of output 30 [2022-12-14 04:56:21,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:21,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:56:22,138 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 04:56:22,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:22,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:22,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:22,224 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 132 treesize of output 112 [2022-12-14 04:56:22,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:22,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:22,479 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 04:56:22,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:22,664 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 04:56:22,798 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:56:22,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:24,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6731#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:56:24,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:56:24,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:24,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 19] total 56 [2022-12-14 04:56:24,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314366851] [2022-12-14 04:56:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:24,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 04:56:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 04:56:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=4284, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 04:56:24,876 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 04:56:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:25,440 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2022-12-14 04:56:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 04:56:25,440 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 94 [2022-12-14 04:56:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:25,441 INFO L225 Difference]: With dead ends: 132 [2022-12-14 04:56:25,441 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 04:56:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=988, Invalid=5174, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 04:56:25,442 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:25,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 133 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:56:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 04:56:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-12-14 04:56:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 04:56:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2022-12-14 04:56:25,472 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 94 [2022-12-14 04:56:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:25,472 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2022-12-14 04:56:25,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 04:56:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2022-12-14 04:56:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 04:56:25,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:25,473 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 04:56:25,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:56:25,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 04:56:25,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -983796348, now seen corresponding path program 9 times [2022-12-14 04:56:25,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:25,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438939165] [2022-12-14 04:56:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:25,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:27,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:27,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438939165] [2022-12-14 04:56:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438939165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:27,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871473221] [2022-12-14 04:56:27,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:56:27,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:27,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:27,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:27,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:56:27,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:56:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 04:56:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:27,387 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 04:56:27,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:56:27,449 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 42 treesize of output 30 [2022-12-14 04:56:27,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:27,460 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 31 treesize of output 17 [2022-12-14 04:56:27,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:56:27,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:27,499 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 55 treesize of output 41 [2022-12-14 04:56:27,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:56:27,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:27,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 04:56:27,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-12-14 04:56:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:28,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:28,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:56:28,686 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 53 treesize of output 40 [2022-12-14 04:56:28,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:28,690 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 40 treesize of output 39 [2022-12-14 04:56:28,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:28,699 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 39 treesize of output 34 [2022-12-14 04:56:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:28,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871473221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523607580] [2022-12-14 04:56:28,919 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:56:28,919 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:56:28,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:56:28,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:56:28,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:56:28,954 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:56:28,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:56:28,965 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 04:56:29,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:56:29,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 151 treesize of output 123 [2022-12-14 04:56:29,075 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 10 treesize of output 3 [2022-12-14 04:56:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:29,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:29,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:29,342 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:56:29,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 822 treesize of output 845 [2022-12-14 04:56:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:29,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 615 treesize of output 600 [2022-12-14 04:56:29,490 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:56:29,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 04:56:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:56:31,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:31,478 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 16 treesize of output 12 [2022-12-14 04:56:31,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:56:31,534 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 42 treesize of output 30 [2022-12-14 04:56:31,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:31,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:56:31,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:31,904 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 04:56:31,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:31,960 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 04:56:32,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:32,097 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 04:56:32,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:32,247 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 04:56:32,387 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 04:56:32,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:32,433 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 04:56:32,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:32,493 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 42 treesize of output 30 [2022-12-14 04:56:32,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:32,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:32,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:32,734 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 04:56:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:56:32,809 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 42 treesize of output 30 [2022-12-14 04:56:32,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:32,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:56:33,074 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 04:56:33,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:33,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:33,143 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 42 treesize of output 30 [2022-12-14 04:56:33,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:33,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:33,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:33,405 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 04:56:33,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:33,575 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 04:56:33,679 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:56:33,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:56:35,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7790#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:56:35,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:56:35,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:35,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 24] total 67 [2022-12-14 04:56:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660358652] [2022-12-14 04:56:35,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:35,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 04:56:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 04:56:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6374, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 04:56:35,369 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 67 states, 67 states have (on average 2.7611940298507465) internal successors, (185), 66 states have internal predecessors, (185), 16 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2022-12-14 04:56:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:52,211 INFO L93 Difference]: Finished difference Result 421 states and 508 transitions. [2022-12-14 04:56:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-12-14 04:56:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.7611940298507465) internal successors, (185), 66 states have internal predecessors, (185), 16 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) Word has length 111 [2022-12-14 04:56:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:52,213 INFO L225 Difference]: With dead ends: 421 [2022-12-14 04:56:52,213 INFO L226 Difference]: Without dead ends: 419 [2022-12-14 04:56:52,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30671 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=5960, Invalid=79596, Unknown=0, NotChecked=0, Total=85556 [2022-12-14 04:56:52,216 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 684 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 6168 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 7451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 6168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:52,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 840 Invalid, 7451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 6168 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 04:56:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-12-14 04:56:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 94. [2022-12-14 04:56:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 04:56:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2022-12-14 04:56:52,257 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 111 [2022-12-14 04:56:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:52,257 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2022-12-14 04:56:52,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.7611940298507465) internal successors, (185), 66 states have internal predecessors, (185), 16 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2022-12-14 04:56:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2022-12-14 04:56:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 04:56:52,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:52,258 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 04:56:52,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 04:56:52,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 04:56:52,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 585318192, now seen corresponding path program 10 times [2022-12-14 04:56:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575896621] [2022-12-14 04:56:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:53,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575896621] [2022-12-14 04:56:53,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575896621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299979321] [2022-12-14 04:56:53,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:56:53,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:53,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:53,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:56:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:53,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 04:56:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:54,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 04:56:54,080 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 21 treesize of output 10 [2022-12-14 04:56:54,081 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 10 treesize of output 3 [2022-12-14 04:56:54,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:56:54,139 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 30 treesize of output 19 [2022-12-14 04:56:54,142 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 19 treesize of output 12 [2022-12-14 04:56:54,150 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 31 treesize of output 17 [2022-12-14 04:56:54,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 04:56:54,176 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 24 treesize of output 13 [2022-12-14 04:56:54,178 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 13 treesize of output 9 [2022-12-14 04:56:54,188 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 22 treesize of output 14 [2022-12-14 04:56:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:54,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:55,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:56:55,336 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 58 treesize of output 42 [2022-12-14 04:56:55,339 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 11 treesize of output 4 [2022-12-14 04:56:55,347 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:56:55,347 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 19 treesize of output 13 [2022-12-14 04:56:55,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:56:55,353 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 30 treesize of output 25 [2022-12-14 04:56:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:56:55,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299979321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:55,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53305818] [2022-12-14 04:56:55,629 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:56:55,629 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:56:55,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:56:55,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:56:55,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:56:55,671 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:56:55,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:56:55,681 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 04:56:55,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:56:55,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 147 treesize of output 119 [2022-12-14 04:56:55,801 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 10 treesize of output 3 [2022-12-14 04:56:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:56,182 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:56:56,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 811 treesize of output 834 [2022-12-14 04:56:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:56,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:56:56,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 622 treesize of output 607 [2022-12-14 04:56:56,482 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:56:56,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 04:56:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:58,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:58,325 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 04:56:58,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:56:58,379 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 42 treesize of output 30 [2022-12-14 04:56:58,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:58,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:56:58,706 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 04:56:58,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:58,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:58,754 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 04:56:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:58,811 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 42 treesize of output 30 [2022-12-14 04:56:58,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:58,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:59,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:59,130 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 16 treesize of output 12 [2022-12-14 04:56:59,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:56:59,222 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 42 treesize of output 30 [2022-12-14 04:56:59,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:56:59,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:59,512 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 16 treesize of output 12 [2022-12-14 04:56:59,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:56:59,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:56:59,626 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 132 treesize of output 112 [2022-12-14 04:56:59,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:56:59,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:56:59,887 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 04:57:00,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:00,047 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 04:57:00,192 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:57:00,194 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:57:02,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9702#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:57:02,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:57:02,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:57:02,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 65 [2022-12-14 04:57:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867635753] [2022-12-14 04:57:02,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:57:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 04:57:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 04:57:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=6128, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 04:57:02,702 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 65 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2022-12-14 04:57:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:21,977 INFO L93 Difference]: Finished difference Result 475 states and 570 transitions. [2022-12-14 04:57:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-12-14 04:57:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 65 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) Word has length 114 [2022-12-14 04:57:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:21,979 INFO L225 Difference]: With dead ends: 475 [2022-12-14 04:57:21,979 INFO L226 Difference]: Without dead ends: 473 [2022-12-14 04:57:21,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31242 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=5696, Invalid=82810, Unknown=0, NotChecked=0, Total=88506 [2022-12-14 04:57:21,983 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 766 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 7664 mSolverCounterSat, 1618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 9282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1618 IncrementalHoareTripleChecker+Valid, 7664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:21,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 1023 Invalid, 9282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1618 Valid, 7664 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 04:57:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-12-14 04:57:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 94. [2022-12-14 04:57:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 04:57:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2022-12-14 04:57:22,025 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 114 [2022-12-14 04:57:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:22,025 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2022-12-14 04:57:22,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 65 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2022-12-14 04:57:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2022-12-14 04:57:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 04:57:22,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:22,026 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 04:57:22,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:57:22,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:22,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash 535377540, now seen corresponding path program 11 times [2022-12-14 04:57:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:22,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460768076] [2022-12-14 04:57:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:22,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 346 proven. 104 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:57:22,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460768076] [2022-12-14 04:57:22,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460768076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374681761] [2022-12-14 04:57:22,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:57:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:22,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:22,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:57:32,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 04:57:32,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:57:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:57:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 392 proven. 58 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:57:33,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 392 proven. 58 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 04:57:34,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374681761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801342150] [2022-12-14 04:57:34,465 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:57:34,465 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:57:34,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:57:34,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:57:34,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:57:34,509 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:57:34,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:57:34,521 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 04:57:34,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:57:34,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 158 treesize of output 128 [2022-12-14 04:57:34,627 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 10 treesize of output 3 [2022-12-14 04:57:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:57:34,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:57:34,924 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:57:34,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 807 treesize of output 830 [2022-12-14 04:57:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:34,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 600 treesize of output 587 [2022-12-14 04:57:35,142 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:57:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 04:57:35,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:57:36,935 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 04:57:36,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:36,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:57:37,000 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 42 treesize of output 30 [2022-12-14 04:57:37,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:37,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:57:37,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,326 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 04:57:37,369 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 04:57:37,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,504 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 16 treesize of output 12 [2022-12-14 04:57:37,622 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 04:57:37,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,758 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 04:57:37,814 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 04:57:37,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:37,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:57:37,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:37,891 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 132 treesize of output 112 [2022-12-14 04:57:37,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:57:38,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:38,137 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 04:57:38,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:57:38,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:38,215 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 174 treesize of output 154 [2022-12-14 04:57:38,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:57:38,459 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 04:57:38,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:38,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:57:38,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:38,539 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 132 treesize of output 112 [2022-12-14 04:57:38,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:57:38,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:38,760 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 04:57:38,976 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 16 treesize of output 12 [2022-12-14 04:57:38,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:39,076 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:57:39,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:57:41,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11764#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:57:41,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:57:41,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:57:41,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 70 [2022-12-14 04:57:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114150933] [2022-12-14 04:57:41,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:57:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 04:57:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 04:57:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=6064, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 04:57:41,015 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-12-14 04:57:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:41,641 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2022-12-14 04:57:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 04:57:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 123 [2022-12-14 04:57:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:41,643 INFO L225 Difference]: With dead ends: 165 [2022-12-14 04:57:41,643 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 04:57:41,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1451, Invalid=7291, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 04:57:41,644 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:41,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 196 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:57:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 04:57:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2022-12-14 04:57:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 04:57:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-12-14 04:57:41,694 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 123 [2022-12-14 04:57:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:41,694 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-12-14 04:57:41,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-12-14 04:57:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-12-14 04:57:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 04:57:41,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:41,695 INFO L195 NwaCegarLoop]: trace histogram [20, 17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 04:57:41,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 04:57:41,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 04:57:41,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -932355759, now seen corresponding path program 12 times [2022-12-14 04:57:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:41,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336819764] [2022-12-14 04:57:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:41,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:57:43,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336819764] [2022-12-14 04:57:43,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336819764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040194798] [2022-12-14 04:57:43,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:57:43,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:43,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:57:43,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:57:43,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:57:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 04:57:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:43,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:43,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:43,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 04:57:44,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 04:57:44,057 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 55 treesize of output 41 [2022-12-14 04:57:44,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 04:57:44,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:44,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:44,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 105 [2022-12-14 04:57:44,177 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 76 treesize of output 60 [2022-12-14 04:57:44,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 04:57:44,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 04:57:44,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:44,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 109 [2022-12-14 04:57:44,256 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 54 treesize of output 40 [2022-12-14 04:57:44,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-12-14 04:57:44,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2022-12-14 04:57:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:57:45,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:45,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:45,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:57:45,721 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 53 treesize of output 40 [2022-12-14 04:57:45,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:45,726 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 40 treesize of output 39 [2022-12-14 04:57:45,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:45,735 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 39 treesize of output 34 [2022-12-14 04:57:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:57:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040194798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164391847] [2022-12-14 04:57:46,092 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:57:46,092 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:57:46,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:57:46,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:57:46,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:57:46,134 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 04:57:46,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-12-14 04:57:46,169 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:57:46,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:57:46,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:57:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-12-14 04:57:46,305 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 10 treesize of output 3 [2022-12-14 04:57:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:57:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:57:46,571 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:57:46,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 819 treesize of output 842 [2022-12-14 04:57:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:57:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:57:46,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 666 treesize of output 647 [2022-12-14 04:57:46,910 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:57:46,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-12-14 04:57:46,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:57:48,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:48,599 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 04:57:48,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:57:48,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:48,679 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 144 treesize of output 124 [2022-12-14 04:57:48,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:57:48,947 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 04:57:48,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:48,993 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 04:57:48,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,160 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 04:57:49,283 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 04:57:49,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,426 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 04:57:49,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,477 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 04:57:49,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:57:49,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:49,558 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 132 treesize of output 112 [2022-12-14 04:57:49,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:57:49,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:49,815 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 04:57:49,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:57:49,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:49,895 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 174 treesize of output 154 [2022-12-14 04:57:49,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:57:50,169 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 04:57:50,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:50,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:57:50,235 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 42 treesize of output 30 [2022-12-14 04:57:50,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:57:50,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:57:50,488 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 04:57:50,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:50,672 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 04:57:50,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:57:50,783 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:57:50,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:57:53,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13071#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:57:53,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:57:53,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:57:53,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 63 [2022-12-14 04:57:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938685134] [2022-12-14 04:57:53,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:57:53,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 04:57:53,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 04:57:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=5810, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 04:57:53,042 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 62 states have internal predecessors, (190), 20 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 20 states have call predecessors, (60), 20 states have call successors, (60) [2022-12-14 04:58:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:58:24,661 INFO L93 Difference]: Finished difference Result 641 states and 757 transitions. [2022-12-14 04:58:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 312 states. [2022-12-14 04:58:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 62 states have internal predecessors, (190), 20 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 20 states have call predecessors, (60), 20 states have call successors, (60) Word has length 140 [2022-12-14 04:58:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:58:24,663 INFO L225 Difference]: With dead ends: 641 [2022-12-14 04:58:24,663 INFO L226 Difference]: Without dead ends: 639 [2022-12-14 04:58:24,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 367 SyntacticMatches, 4 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57348 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=8643, Invalid=142289, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 04:58:24,669 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1011 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 8390 mSolverCounterSat, 2114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 10504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2114 IncrementalHoareTripleChecker+Valid, 8390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:58:24,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 1208 Invalid, 10504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2114 Valid, 8390 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-14 04:58:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-12-14 04:58:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 112. [2022-12-14 04:58:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 04:58:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2022-12-14 04:58:24,731 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 140 [2022-12-14 04:58:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:58:24,732 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2022-12-14 04:58:24,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 62 states have internal predecessors, (190), 20 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 20 states have call predecessors, (60), 20 states have call successors, (60) [2022-12-14 04:58:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2022-12-14 04:58:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 04:58:24,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:58:24,733 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 04:58:24,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 04:58:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:58:24,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:58:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:58:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1411180931, now seen corresponding path program 13 times [2022-12-14 04:58:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:58:24,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920229324] [2022-12-14 04:58:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:58:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:58:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:58:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:58:25,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:58:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920229324] [2022-12-14 04:58:25,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920229324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:58:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878243616] [2022-12-14 04:58:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:58:25,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:58:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:58:25,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:58:25,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:58:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:58:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 04:58:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:58:26,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-12-14 04:58:26,433 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 04:58:26,436 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 18 treesize of output 7 [2022-12-14 04:58:26,437 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 7 treesize of output 3 [2022-12-14 04:58:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:58:27,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:58:27,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:58:27,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 04:58:27,639 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 04:58:27,639 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 19 treesize of output 13 [2022-12-14 04:58:27,643 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 11 treesize of output 4 [2022-12-14 04:58:27,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:58:27,646 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 30 treesize of output 25 [2022-12-14 04:58:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:58:27,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878243616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:58:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130980147] [2022-12-14 04:58:27,962 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 04:58:27,962 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:58:27,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:58:27,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:58:27,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:58:28,009 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 04:58:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-12-14 04:58:28,048 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:58:28,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 04:58:28,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 04:58:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-12-14 04:58:28,162 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 10 treesize of output 3 [2022-12-14 04:58:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:58:28,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:58:28,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:58:28,407 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 04:58:28,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 800 treesize of output 823 [2022-12-14 04:58:28,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:58:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 629 treesize of output 614 [2022-12-14 04:58:28,679 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 04:58:28,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-12-14 04:58:28,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 04:58:30,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:30,480 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 04:58:30,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 04:58:30,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:58:30,558 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 144 treesize of output 124 [2022-12-14 04:58:30,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 04:58:30,888 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 04:58:30,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:30,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:30,945 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 04:58:31,086 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 04:58:31,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:31,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:31,248 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 04:58:31,383 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 04:58:31,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:31,428 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 16 treesize of output 12 [2022-12-14 04:58:31,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:31,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:58:31,489 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 42 treesize of output 30 [2022-12-14 04:58:31,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:58:31,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:58:31,728 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 04:58:31,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 04:58:31,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:58:31,807 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 174 treesize of output 154 [2022-12-14 04:58:31,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 04:58:32,072 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 16 treesize of output 12 [2022-12-14 04:58:32,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:32,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 04:58:32,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 04:58:32,149 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 132 treesize of output 112 [2022-12-14 04:58:32,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 04:58:32,463 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 04:58:32,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:32,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:58:32,642 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 04:58:32,761 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 04:58:32,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:58:34,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15727#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 04:58:34,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:58:34,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:58:34,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 65 [2022-12-14 04:58:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195098803] [2022-12-14 04:58:34,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:58:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 04:58:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:58:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 04:58:34,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6179, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 04:58:34,750 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 65 states, 65 states have (on average 3.2) internal successors, (208), 65 states have internal predecessors, (208), 15 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2022-12-14 04:59:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:59:21,073 INFO L93 Difference]: Finished difference Result 845 states and 979 transitions. [2022-12-14 04:59:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 431 states. [2022-12-14 04:59:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.2) internal successors, (208), 65 states have internal predecessors, (208), 15 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) Word has length 149 [2022-12-14 04:59:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:59:21,076 INFO L225 Difference]: With dead ends: 845 [2022-12-14 04:59:21,076 INFO L226 Difference]: Without dead ends: 843 [2022-12-14 04:59:21,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103533 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=12173, Invalid=247417, Unknown=0, NotChecked=0, Total=259590 [2022-12-14 04:59:21,091 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1207 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 13683 mSolverCounterSat, 2969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 16652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2969 IncrementalHoareTripleChecker+Valid, 13683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:59:21,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 1855 Invalid, 16652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2969 Valid, 13683 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 04:59:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-12-14 04:59:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 115. [2022-12-14 04:59:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 04:59:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-12-14 04:59:21,180 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 149 [2022-12-14 04:59:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:59:21,181 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-12-14 04:59:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.2) internal successors, (208), 65 states have internal predecessors, (208), 15 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2022-12-14 04:59:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-12-14 04:59:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 04:59:21,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:59:21,181 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 04:59:21,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 04:59:21,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 04:59:21,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:59:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:59:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1356715729, now seen corresponding path program 14 times [2022-12-14 04:59:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:59:21,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339014431] [2022-12-14 04:59:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:59:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 552 proven. 153 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 04:59:22,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:59:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339014431] [2022-12-14 04:59:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339014431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:59:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948166871] [2022-12-14 04:59:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:59:22,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:59:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:59:22,370 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:59:22,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:00:18,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 05:00:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:00:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 05:00:18,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 610 proven. 95 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 05:00:19,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 610 proven. 95 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 05:00:20,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948166871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:20,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724457450] [2022-12-14 05:00:20,220 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:00:20,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:20,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:20,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:20,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:20,259 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:00:20,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:00:20,270 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 05:00:20,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:00:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 100 treesize of output 82 [2022-12-14 05:00:20,385 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 10 treesize of output 3 [2022-12-14 05:00:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:20,674 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:00:20,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 853 treesize of output 876 [2022-12-14 05:00:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:20,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 718 treesize of output 693 [2022-12-14 05:00:20,848 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:00:20,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:00:20,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:22,837 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 05:00:22,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:22,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 05:00:22,898 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 42 treesize of output 30 [2022-12-14 05:00:22,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:22,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 05:00:23,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,202 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 05:00:23,245 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 16 treesize of output 12 [2022-12-14 05:00:23,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,383 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 05:00:23,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,505 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 05:00:23,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,641 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 05:00:23,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:23,694 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 05:00:23,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:00:23,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:23,767 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 132 treesize of output 112 [2022-12-14 05:00:23,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:00:24,016 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 05:00:24,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:24,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 05:00:24,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:24,110 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 174 treesize of output 154 [2022-12-14 05:00:24,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 05:00:24,360 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 05:00:24,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:24,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:00:24,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:24,443 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 132 treesize of output 112 [2022-12-14 05:00:24,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:00:24,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:24,706 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 05:00:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:24,878 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 16 treesize of output 12 [2022-12-14 05:00:25,003 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:00:25,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:27,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18945#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:27,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:27,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:27,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 29] total 85 [2022-12-14 05:00:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804765127] [2022-12-14 05:00:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:27,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 05:00:27,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 05:00:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1810, Invalid=8290, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 05:00:27,188 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 85 states, 85 states have (on average 3.1882352941176473) internal successors, (271), 85 states have internal predecessors, (271), 15 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2022-12-14 05:00:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:28,041 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2022-12-14 05:00:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 05:00:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.1882352941176473) internal successors, (271), 85 states have internal predecessors, (271), 15 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) Word has length 152 [2022-12-14 05:00:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:28,042 INFO L225 Difference]: With dead ends: 198 [2022-12-14 05:00:28,042 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 05:00:28,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2074, Invalid=9916, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 05:00:28,043 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:28,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 218 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:00:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 05:00:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-12-14 05:00:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 05:00:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2022-12-14 05:00:28,139 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 152 [2022-12-14 05:00:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:28,140 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2022-12-14 05:00:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.1882352941176473) internal successors, (271), 85 states have internal predecessors, (271), 15 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 15 states have call predecessors, (60), 15 states have call successors, (60) [2022-12-14 05:00:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2022-12-14 05:00:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 05:00:28,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:28,141 INFO L195 NwaCegarLoop]: trace histogram [24, 21, 20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:00:28,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:00:28,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:00:28,342 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 88562468, now seen corresponding path program 15 times [2022-12-14 05:00:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:28,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53296680] [2022-12-14 05:00:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 751 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:00:30,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53296680] [2022-12-14 05:00:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53296680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933980972] [2022-12-14 05:00:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:00:30,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:30,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:30,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:00:31,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:00:31,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:00:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 05:00:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:31,605 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 05:00:31,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:31,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:00:31,691 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 42 treesize of output 30 [2022-12-14 05:00:31,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-12-14 05:00:31,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:00:31,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 105 [2022-12-14 05:00:31,797 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 76 treesize of output 60 [2022-12-14 05:00:31,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 05:00:31,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-12-14 05:00:31,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:00:31,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 109 [2022-12-14 05:00:31,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-12-14 05:00:31,917 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 83 treesize of output 63 [2022-12-14 05:00:31,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-12-14 05:00:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 751 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:00:33,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:34,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:00:34,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:00:34,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:00:34,080 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 40 treesize of output 39 [2022-12-14 05:00:34,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:00:34,093 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 44 treesize of output 39 [2022-12-14 05:00:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 751 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:00:34,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933980972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789692453] [2022-12-14 05:00:34,491 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:00:34,491 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:34,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:34,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:34,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:34,525 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:00:34,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:00:34,533 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 05:00:34,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:00:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 140 treesize of output 114 [2022-12-14 05:00:34,645 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 10 treesize of output 3 [2022-12-14 05:00:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:34,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:34,887 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:00:34,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 826 treesize of output 849 [2022-12-14 05:00:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:34,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 637 treesize of output 620 [2022-12-14 05:00:35,191 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:00:35,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-12-14 05:00:35,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-12-14 05:00:36,836 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 05:00:36,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:36,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 05:00:36,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:36,919 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 144 treesize of output 124 [2022-12-14 05:00:36,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 05:00:37,238 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 05:00:37,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,295 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 05:00:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,431 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 05:00:37,566 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 05:00:37,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,707 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 16 treesize of output 12 [2022-12-14 05:00:37,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:37,765 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 05:00:37,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:00:37,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:37,846 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 132 treesize of output 112 [2022-12-14 05:00:37,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:00:38,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:38,073 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 05:00:38,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 05:00:38,147 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 42 treesize of output 30 [2022-12-14 05:00:38,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:38,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 05:00:38,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:38,432 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 05:00:38,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:00:38,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:00:38,521 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 132 treesize of output 112 [2022-12-14 05:00:38,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:00:38,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:38,774 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 05:00:38,950 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 05:00:38,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:00:39,059 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:00:39,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:41,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20518#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:41,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:41,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:41,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 34] total 77 [2022-12-14 05:00:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637806975] [2022-12-14 05:00:41,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 05:00:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 05:00:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=8088, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:00:41,510 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 77 states, 77 states have (on average 3.0) internal successors, (231), 76 states have internal predecessors, (231), 23 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 23 states have call predecessors, (72), 23 states have call successors, (72) [2022-12-14 05:01:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:39,407 INFO L93 Difference]: Finished difference Result 905 states and 1046 transitions. [2022-12-14 05:01:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2022-12-14 05:01:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0) internal successors, (231), 76 states have internal predecessors, (231), 23 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 23 states have call predecessors, (72), 23 states have call successors, (72) Word has length 169 [2022-12-14 05:01:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:39,409 INFO L225 Difference]: With dead ends: 905 [2022-12-14 05:01:39,409 INFO L226 Difference]: Without dead ends: 903 [2022-12-14 05:01:39,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 446 SyntacticMatches, 3 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137519 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=16280, Invalid=324192, Unknown=0, NotChecked=0, Total=340472 [2022-12-14 05:01:39,422 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1266 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 12993 mSolverCounterSat, 3019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 16012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3019 IncrementalHoareTripleChecker+Valid, 12993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:39,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 1707 Invalid, 16012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3019 Valid, 12993 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 05:01:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-12-14 05:01:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 136. [2022-12-14 05:01:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 05:01:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-12-14 05:01:39,524 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 169 [2022-12-14 05:01:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:39,525 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-12-14 05:01:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0) internal successors, (231), 76 states have internal predecessors, (231), 23 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 23 states have call predecessors, (72), 23 states have call successors, (72) [2022-12-14 05:01:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-12-14 05:01:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 05:01:39,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:39,526 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:01:39,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 05:01:39,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:01:39,728 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash 394832932, now seen corresponding path program 16 times [2022-12-14 05:01:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:39,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237566700] [2022-12-14 05:01:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:39,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 806 proven. 211 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:01:40,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237566700] [2022-12-14 05:01:40,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237566700] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599888462] [2022-12-14 05:01:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:01:40,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:40,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:40,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:01:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 05:01:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 876 proven. 141 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:01:42,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:01:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 876 proven. 141 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:01:43,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599888462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:01:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748653468] [2022-12-14 05:01:43,534 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:01:43,534 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:01:43,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:01:43,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:01:43,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:01:43,574 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:01:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:01:43,581 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 05:01:43,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:01:43,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 139 treesize of output 111 [2022-12-14 05:01:43,702 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 10 treesize of output 3 [2022-12-14 05:01:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:01:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:01:43,951 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:01:43,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 789 treesize of output 812 [2022-12-14 05:01:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:43,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:01:43,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 636 treesize of output 621 [2022-12-14 05:01:44,262 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:01:44,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-12-14 05:01:44,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:01:46,026 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 05:01:46,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-12-14 05:01:46,083 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 42 treesize of output 30 [2022-12-14 05:01:46,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:01:46,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-12-14 05:01:46,400 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 05:01:46,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,450 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 05:01:46,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,581 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 05:01:46,707 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 16 treesize of output 12 [2022-12-14 05:01:46,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,843 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 05:01:46,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,892 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 05:01:46,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:46,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:01:46,953 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 42 treesize of output 30 [2022-12-14 05:01:46,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:01:46,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:01:47,189 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 05:01:47,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:47,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-12-14 05:01:47,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:01:47,267 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 174 treesize of output 154 [2022-12-14 05:01:47,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-12-14 05:01:47,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:47,490 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 05:01:47,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-12-14 05:01:47,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-12-14 05:01:47,565 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 132 treesize of output 112 [2022-12-14 05:01:47,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-12-14 05:01:47,822 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 05:01:47,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:48,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 05:01:48,009 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 05:01:48,139 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:01:48,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:01:50,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24161#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-12-14 05:01:50,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:01:50,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:01:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 34] total 100 [2022-12-14 05:01:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891372478] [2022-12-14 05:01:50,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:01:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-14 05:01:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-14 05:01:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2484, Invalid=10856, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 05:01:50,084 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 100 states, 100 states have (on average 3.22) internal successors, (322), 100 states have internal predecessors, (322), 18 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) [2022-12-14 05:01:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:50,907 INFO L93 Difference]: Finished difference Result 231 states and 264 transitions. [2022-12-14 05:01:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 05:01:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.22) internal successors, (322), 100 states have internal predecessors, (322), 18 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) Word has length 181 [2022-12-14 05:01:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:50,909 INFO L225 Difference]: With dead ends: 231 [2022-12-14 05:01:50,909 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 05:01:50,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 462 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6888 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2814, Invalid=12936, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 05:01:50,910 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:50,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 245 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:01:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 05:01:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-12-14 05:01:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 28 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 05:01:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2022-12-14 05:01:51,024 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 181 [2022-12-14 05:01:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:51,025 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2022-12-14 05:01:51,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.22) internal successors, (322), 100 states have internal predecessors, (322), 18 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) [2022-12-14 05:01:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2022-12-14 05:01:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-12-14 05:01:51,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:51,026 INFO L195 NwaCegarLoop]: trace histogram [28, 25, 24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:01:51,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:01:51,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:01:51,228 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2009510735, now seen corresponding path program 17 times [2022-12-14 05:01:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981066232] [2022-12-14 05:01:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1072 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-12-14 05:01:53,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981066232] [2022-12-14 05:01:53,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981066232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774619494] [2022-12-14 05:01:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:01:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:53,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:53,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc7b89b-c299-41b0-acaf-a532b726c6f5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process