./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.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_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/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_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/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_52a17d76-e1da-46e7-b06e-f2a827d2daff/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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- 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 06:51:12,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:51:12,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:51:12,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:51:12,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:51:12,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:51:12,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:51:12,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:51:12,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:51:12,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:51:12,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:51:12,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:51:12,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:51:12,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:51:12,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:51:12,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:51:12,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:51:12,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:51:12,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:51:12,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:51:12,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:51:12,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:51:12,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:51:12,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:51:12,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:51:12,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:51:12,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:51:12,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:51:12,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:51:12,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:51:12,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:51:12,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:51:12,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:51:12,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:51:12,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:51:12,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:51:12,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:51:12,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:51:12,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:51:12,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:51:12,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:51:12,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:51:12,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:51:12,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:51:12,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:51:12,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:51:12,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:51:12,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:51:12,541 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:51:12,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:51:12,541 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:51:12,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:51:12,546 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:51:12,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:51:12,547 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:51:12,547 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:51:12,547 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:51:12,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:51:12,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:51:12,547 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:51:12,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:51:12,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:51:12,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:51:12,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:51:12,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:51:12,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:51:12,551 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:51:12,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:51:12,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:51:12,551 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:51:12,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:51:12,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:51:12,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:51:12,552 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_52a17d76-e1da-46e7-b06e-f2a827d2daff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2022-12-14 06:51:12,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:51:12,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:51:12,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:51:12,741 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:51:12,741 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:51:12,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-12-14 06:51:15,383 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:51:15,520 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:51:15,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-12-14 06:51:15,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/data/2ae8a651e/f89d495837b4461fa4206639e0a2ea54/FLAG914306ce4 [2022-12-14 06:51:15,536 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/data/2ae8a651e/f89d495837b4461fa4206639e0a2ea54 [2022-12-14 06:51:15,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:51:15,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:51:15,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:51:15,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:51:15,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:51:15,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657bc378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15, skipping insertion in model container [2022-12-14 06:51:15,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:51:15,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:51:15,707 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_52a17d76-e1da-46e7-b06e-f2a827d2daff/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-12-14 06:51:15,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:51:15,738 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:51:15,750 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_52a17d76-e1da-46e7-b06e-f2a827d2daff/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-12-14 06:51:15,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:51:15,775 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:51:15,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15 WrapperNode [2022-12-14 06:51:15,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:51:15,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:51:15,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:51:15,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:51:15,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,806 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2022-12-14 06:51:15,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:51:15,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:51:15,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:51:15,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:51:15,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:51:15,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:51:15,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:51:15,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:51:15,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (1/1) ... [2022-12-14 06:51:15,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:51:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:15,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:51:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:51:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:51:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:51:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:51:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:51:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:51:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:51:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:51:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:51:15,957 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:51:15,958 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:51:16,089 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:51:16,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:51:16,133 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 06:51:16,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:51:16 BoogieIcfgContainer [2022-12-14 06:51:16,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:51:16,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:51:16,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:51:16,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:51:16,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:51:15" (1/3) ... [2022-12-14 06:51:16,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f18cb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:51:16, skipping insertion in model container [2022-12-14 06:51:16,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:15" (2/3) ... [2022-12-14 06:51:16,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f18cb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:51:16, skipping insertion in model container [2022-12-14 06:51:16,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:51:16" (3/3) ... [2022-12-14 06:51:16,141 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2022-12-14 06:51:16,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:51:16,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:51:16,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:51:16,194 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;@6a0257ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:51:16,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:51:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:51:16,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:16,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:16,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2022-12-14 06:51:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23180078] [2022-12-14 06:51:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:16,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:16,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559619993] [2022-12-14 06:51:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:16,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:16,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:51:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:51:16,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:16,409 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 06:51:16,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:16,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23180078] [2022-12-14 06:51:16,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559619993] [2022-12-14 06:51:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559619993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:51:16,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232567151] [2022-12-14 06:51:16,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:51:16,439 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 06:51:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:16,496 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2022-12-14 06:51:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:51:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:16,504 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:51:16,504 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:51:16,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:51:16,508 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:16,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:51:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:51:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-12-14 06:51:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2022-12-14 06:51:16,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2022-12-14 06:51:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:16,532 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2022-12-14 06:51:16,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 06:51:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2022-12-14 06:51:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:51:16,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:16,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:16,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 06:51:16,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2022-12-14 06:51:16,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:16,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459010958] [2022-12-14 06:51:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:16,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087187398] [2022-12-14 06:51:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:16,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:16,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:16,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:51:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:51:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:16,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:16,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459010958] [2022-12-14 06:51:16,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087187398] [2022-12-14 06:51:16,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087187398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:16,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:16,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:51:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088989852] [2022-12-14 06:51:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:16,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:51:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:51:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:16,924 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:16,981 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-12-14 06:51:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:51:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:51:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:16,982 INFO L225 Difference]: With dead ends: 47 [2022-12-14 06:51:16,982 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 06:51:16,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 06:51:16,984 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:16,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 9 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:51:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 06:51:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-12-14 06:51:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2022-12-14 06:51:16,989 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2022-12-14 06:51:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:16,990 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2022-12-14 06:51:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2022-12-14 06:51:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 06:51:16,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:16,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:16,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:51:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:17,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2022-12-14 06:51:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172998018] [2022-12-14 06:51:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:17,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:17,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389512026] [2022-12-14 06:51:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:17,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:17,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:17,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:17,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:51:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:51:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:17,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:17,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172998018] [2022-12-14 06:51:17,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389512026] [2022-12-14 06:51:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389512026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:17,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:17,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:51:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679268710] [2022-12-14 06:51:17,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:17,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:51:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:51:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:17,392 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:17,445 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2022-12-14 06:51:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:51:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 06:51:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:17,446 INFO L225 Difference]: With dead ends: 50 [2022-12-14 06:51:17,446 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 06:51:17,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 06:51:17,448 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:17,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:51:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 06:51:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-12-14 06:51:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 06:51:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-12-14 06:51:17,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2022-12-14 06:51:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:17,455 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-12-14 06:51:17,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-12-14 06:51:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:51:17,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:17,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:17,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:51:17,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:17,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2022-12-14 06:51:17,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:17,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956655833] [2022-12-14 06:51:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:17,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617790607] [2022-12-14 06:51:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:17,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:17,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:17,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:17,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:51:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:17,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:17,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956655833] [2022-12-14 06:51:17,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617790607] [2022-12-14 06:51:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617790607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639640728] [2022-12-14 06:51:17,781 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:51:17,781 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:17,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:17,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:17,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:17,905 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:51:17,905 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:51:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:17,989 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:17,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:18,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:51:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:18,634 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:51:18,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:51:18,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:19,004 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 28 treesize of output 24 [2022-12-14 06:51:19,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:19,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:19,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1639640728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:19,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:19,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2022-12-14 06:51:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640156024] [2022-12-14 06:51:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:19,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:51:19,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:51:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:51:19,534 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 06:51:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:19,754 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2022-12-14 06:51:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:51:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 06:51:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:19,755 INFO L225 Difference]: With dead ends: 50 [2022-12-14 06:51:19,755 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 06:51:19,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:51:19,756 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:19,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 06:51:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-12-14 06:51:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2022-12-14 06:51:19,768 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2022-12-14 06:51:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:19,768 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2022-12-14 06:51:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 06:51:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2022-12-14 06:51:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:51:19,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:19,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:19,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:51:19,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:19,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2022-12-14 06:51:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168288390] [2022-12-14 06:51:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:19,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845485702] [2022-12-14 06:51:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:19,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:19,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:51:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:20,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:51:20,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:51:20,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168288390] [2022-12-14 06:51:20,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845485702] [2022-12-14 06:51:20,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845485702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590065766] [2022-12-14 06:51:20,063 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 06:51:20,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:20,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:20,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:20,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:20,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,128 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:20,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:20,404 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:20,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:20,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:20,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:20,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:20,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:20,760 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 28 treesize of output 24 [2022-12-14 06:51:20,813 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 28 treesize of output 24 [2022-12-14 06:51:20,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:20,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:20,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:21,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:21,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:21,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:21,165 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 28 treesize of output 24 [2022-12-14 06:51:21,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,213 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:21,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:21,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,287 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:21,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-12-14 06:51:21,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,344 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,414 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:21,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:21,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,452 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,517 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,562 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:21,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,609 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,665 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,702 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:21,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,740 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,819 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:21,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:21,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,885 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:21,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:21,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:21,940 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:21,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:21,945 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:22,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [590065766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:22,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:22,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2022-12-14 06:51:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950449400] [2022-12-14 06:51:22,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:22,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:51:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:51:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:51:22,321 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:22,900 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2022-12-14 06:51:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:51:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 06:51:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:22,901 INFO L225 Difference]: With dead ends: 57 [2022-12-14 06:51:22,901 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 06:51:22,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:51:22,902 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:22,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 06:51:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-12-14 06:51:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 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 06:51:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-12-14 06:51:22,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-12-14 06:51:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:22,913 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-12-14 06:51:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-12-14 06:51:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:51:22,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:22,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:22,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:51:23,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:23,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2022-12-14 06:51:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098398169] [2022-12-14 06:51:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:23,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175967642] [2022-12-14 06:51:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:23,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:23,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:23,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:51:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:51:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:51:23,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098398169] [2022-12-14 06:51:23,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175967642] [2022-12-14 06:51:23,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175967642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9531662] [2022-12-14 06:51:23,230 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:23,230 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:23,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:23,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:23,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:23,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,287 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:23,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:51:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:23,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:23,537 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:51:23,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:51:23,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:23,732 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 28 treesize of output 24 [2022-12-14 06:51:23,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:23,869 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 28 treesize of output 24 [2022-12-14 06:51:23,923 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 28 treesize of output 24 [2022-12-14 06:51:23,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:24,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:24,096 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 28 treesize of output 24 [2022-12-14 06:51:24,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:24,265 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:24,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:24,326 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 28 treesize of output 24 [2022-12-14 06:51:24,357 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 28 treesize of output 24 [2022-12-14 06:51:24,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,409 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:24,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,465 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:24,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:51:24,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,507 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:24,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,557 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:24,558 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,586 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:24,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,638 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:24,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,703 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:24,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-12-14 06:51:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,756 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:24,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:24,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,795 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:24,795 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:24,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,835 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:24,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,864 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:24,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:24,983 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:24,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:25,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:25,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:25,057 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:25,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:25,101 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:25,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:25,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:25,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [9531662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:25,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:25,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2022-12-14 06:51:25,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158942080] [2022-12-14 06:51:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:25,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:51:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:51:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:51:25,649 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:26,285 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2022-12-14 06:51:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:51:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 06:51:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:26,286 INFO L225 Difference]: With dead ends: 59 [2022-12-14 06:51:26,286 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 06:51:26,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:51:26,287 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:26,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:51:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 06:51:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-12-14 06:51:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:51:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-12-14 06:51:26,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2022-12-14 06:51:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:26,296 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-12-14 06:51:26,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-12-14 06:51:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:51:26,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:26,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:26,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:51:26,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:26,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2022-12-14 06:51:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044447896] [2022-12-14 06:51:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:26,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:26,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498060347] [2022-12-14 06:51:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:26,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:26,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:26,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:51:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:51:26,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:51:26,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:26,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044447896] [2022-12-14 06:51:26,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:26,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498060347] [2022-12-14 06:51:26,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498060347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:26,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852601724] [2022-12-14 06:51:26,623 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:26,623 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:26,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:26,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:26,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,680 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:26,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:26,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:26,917 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:26,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,130 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 28 treesize of output 24 [2022-12-14 06:51:27,160 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 28 treesize of output 24 [2022-12-14 06:51:27,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,226 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 24 treesize of output 20 [2022-12-14 06:51:27,292 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:27,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:27,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:27,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:27,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,625 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,625 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,662 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:27,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:51:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,699 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,757 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,794 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,827 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,884 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,918 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:27,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:27,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,950 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:27,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:27,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:27,992 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:27,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,067 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:28,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:28,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,114 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,200 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,278 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:28,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-12-14 06:51:28,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,328 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,365 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,423 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:28,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:28,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,529 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:51:28,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-12-14 06:51:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,619 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,655 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,655 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,710 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:28,710 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 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:28,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,795 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:51:28,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-12-14 06:51:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,853 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,853 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,887 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:28,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,943 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:28,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:28,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:28,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:29,024 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:29,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:29,080 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:29,080 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:29,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:29,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:29,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:29,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:29,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 06:51:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428017138] [2022-12-14 06:51:29,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:51:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:51:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:51:29,921 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:30,052 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2022-12-14 06:51:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:51:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:51:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:30,052 INFO L225 Difference]: With dead ends: 95 [2022-12-14 06:51:30,052 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 06:51:30,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:51:30,054 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:30,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 14 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 06:51:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2022-12-14 06:51:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-12-14 06:51:30,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2022-12-14 06:51:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:30,072 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-12-14 06:51:30,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-12-14 06:51:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:51:30,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:30,073 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, 1, 1, 1] [2022-12-14 06:51:30,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:51:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:30,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2022-12-14 06:51:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209581502] [2022-12-14 06:51:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:30,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:30,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570961549] [2022-12-14 06:51:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:51:30,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:30,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:30,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:30,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:51:30,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:51:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:51:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:51:30,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:51:30,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209581502] [2022-12-14 06:51:30,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570961549] [2022-12-14 06:51:30,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570961549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796200597] [2022-12-14 06:51:30,456 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:30,456 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:30,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:30,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:30,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:30,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,506 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:30,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:30,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:51:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:30,720 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:51:30,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:51:30,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:30,892 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 28 treesize of output 24 [2022-12-14 06:51:30,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:31,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:31,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:31,133 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:31,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:31,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:31,228 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 28 treesize of output 24 [2022-12-14 06:51:31,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:31,325 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:31,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:31,387 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 28 treesize of output 24 [2022-12-14 06:51:31,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:31,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,459 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,492 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:31,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:51:31,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,519 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,573 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:31,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,598 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,645 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,677 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:31,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:31,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,705 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,739 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,773 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:31,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,806 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:31,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:31,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,882 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:31,883 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 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:31,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:31,982 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:51:31,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-12-14 06:51:32,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,040 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,072 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,073 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,129 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:32,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,159 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,159 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,192 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,248 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:32,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,277 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,307 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,348 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,379 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:32,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:32,406 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:32,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:32,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:33,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:33,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:33,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:33,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 06:51:33,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145421900] [2022-12-14 06:51:33,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:33,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:51:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:51:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:51:33,046 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:51:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:33,200 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2022-12-14 06:51:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:51:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:51:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:33,201 INFO L225 Difference]: With dead ends: 162 [2022-12-14 06:51:33,201 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 06:51:33,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-12-14 06:51:33,202 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 137 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:33,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 16 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 06:51:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-12-14 06:51:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-12-14 06:51:33,234 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2022-12-14 06:51:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:33,234 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-12-14 06:51:33,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:51:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-12-14 06:51:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 06:51:33,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:33,235 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:33,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:33,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:33,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2022-12-14 06:51:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334271835] [2022-12-14 06:51:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:33,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478927521] [2022-12-14 06:51:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:51:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:33,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:33,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:51:33,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:51:33,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:51:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-14 06:51:33,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-14 06:51:33,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334271835] [2022-12-14 06:51:33,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478927521] [2022-12-14 06:51:33,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478927521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926526507] [2022-12-14 06:51:33,604 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:33,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:33,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:33,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:33,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,658 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:33,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:33,941 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:33,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:34,073 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 28 treesize of output 24 [2022-12-14 06:51:34,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:34,283 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 28 treesize of output 24 [2022-12-14 06:51:34,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:34,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:34,591 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:34,591 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 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:34,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:34,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,736 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:34,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,787 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:34,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:51:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,848 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:34,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:34,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,895 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:34,895 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,919 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:34,919 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:34,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,967 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:34,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:34,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,021 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:35,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-12-14 06:51:35,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,085 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,119 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,157 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:35,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:35,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,182 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,257 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,332 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:35,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-12-14 06:51:35,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,387 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,417 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,470 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,470 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,539 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:35,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:51:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,588 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,618 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,669 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,699 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,730 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,775 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:35,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:35,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,845 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:35,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:35,895 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:35,895 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:35,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:37,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:37,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:37,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:37,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-12-14 06:51:37,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171628213] [2022-12-14 06:51:37,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:51:37,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:37,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:51:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:51:37,112 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 06:51:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:37,453 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2022-12-14 06:51:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:51:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 06:51:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:37,454 INFO L225 Difference]: With dead ends: 260 [2022-12-14 06:51:37,454 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 06:51:37,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 143 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:51:37,455 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 51 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 06:51:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2022-12-14 06:51:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2022-12-14 06:51:37,488 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2022-12-14 06:51:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:37,489 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2022-12-14 06:51:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 06:51:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2022-12-14 06:51:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:51:37,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:37,490 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:37,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 06:51:37,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2022-12-14 06:51:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:37,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264396155] [2022-12-14 06:51:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:37,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:37,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:37,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386673162] [2022-12-14 06:51:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:51:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:37,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:51:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:51:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-12-14 06:51:37,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-12-14 06:51:37,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264396155] [2022-12-14 06:51:37,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:37,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386673162] [2022-12-14 06:51:37,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386673162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:37,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854154749] [2022-12-14 06:51:37,939 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:37,939 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:37,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:37,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:37,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:37,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:37,995 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:37,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:38,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:38,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:51:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:38,230 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:51:38,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:51:38,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,591 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 24 treesize of output 20 [2022-12-14 06:51:38,659 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:38,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:38,734 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 28 treesize of output 24 [2022-12-14 06:51:38,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:38,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:38,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:38,999 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:38,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,064 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:39,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:51:39,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,142 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,143 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,207 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,242 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,273 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,344 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,344 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,380 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:39,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:39,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,421 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,421 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,462 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,500 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:39,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,534 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,534 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,629 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:39,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:39,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,666 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,703 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,762 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:39,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:39,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,797 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,797 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,837 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,889 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,922 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:39,960 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:39,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:39,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:40,006 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:40,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:40,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:40,090 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:40,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:51:40,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:40,156 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:40,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:40,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:41,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3947#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:41,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:41,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:41,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-14 06:51:41,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723658750] [2022-12-14 06:51:41,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:41,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 06:51:41,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 06:51:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:51:41,492 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:41,762 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2022-12-14 06:51:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:51:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-12-14 06:51:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:41,763 INFO L225 Difference]: With dead ends: 327 [2022-12-14 06:51:41,763 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 06:51:41,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 195 SyntacticMatches, 42 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:51:41,764 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:41,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 32 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 06:51:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2022-12-14 06:51:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 0 states have call successors, (0), 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 06:51:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2022-12-14 06:51:41,821 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2022-12-14 06:51:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:41,821 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2022-12-14 06:51:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2022-12-14 06:51:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:51:41,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:41,822 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:41,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:42,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:42,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2022-12-14 06:51:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383149314] [2022-12-14 06:51:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:42,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:42,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:42,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382766134] [2022-12-14 06:51:42,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:51:42,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:42,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:42,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:51:42,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:51:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-12-14 06:51:42,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-12-14 06:51:42,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383149314] [2022-12-14 06:51:42,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382766134] [2022-12-14 06:51:42,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382766134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097479508] [2022-12-14 06:51:42,327 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:42,328 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:42,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:42,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:42,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,385 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:42,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:42,639 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:42,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:42,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:42,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:42,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:42,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:42,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:42,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:42,982 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:42,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:43,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:43,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:43,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:43,176 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:43,177 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 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:43,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:43,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:43,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,337 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,386 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:43,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:51:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,428 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,507 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:43,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:43,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,535 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,609 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,660 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:43,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:43,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,690 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,691 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,721 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:43,721 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,781 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:43,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:51:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,821 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,911 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:43,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:43,956 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:43,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:43,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,006 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,115 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,219 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:44,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:51:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,280 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,318 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,369 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,407 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,438 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,480 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:44,480 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,555 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:44,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:51:44,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:44,595 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:44,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:44,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:46,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5715#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:46,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:46,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:46,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 06:51:46,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035280535] [2022-12-14 06:51:46,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:51:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:51:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:51:46,247 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 06:51:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:46,520 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2022-12-14 06:51:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:51:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 135 [2022-12-14 06:51:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:46,523 INFO L225 Difference]: With dead ends: 398 [2022-12-14 06:51:46,523 INFO L226 Difference]: Without dead ends: 344 [2022-12-14 06:51:46,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 297 SyntacticMatches, 90 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:51:46,524 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 196 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:46,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 31 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-14 06:51:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2022-12-14 06:51:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 0 states have call successors, (0), 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 06:51:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2022-12-14 06:51:46,584 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2022-12-14 06:51:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:46,584 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2022-12-14 06:51:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 06:51:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2022-12-14 06:51:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 06:51:46,586 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:46,586 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:46,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:46,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2022-12-14 06:51:46,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685431224] [2022-12-14 06:51:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:46,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:46,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:46,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792254837] [2022-12-14 06:51:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:51:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:46,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:46,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:51:46,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:51:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:51:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-12-14 06:51:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-12-14 06:51:46,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685431224] [2022-12-14 06:51:46,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792254837] [2022-12-14 06:51:46,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792254837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809757461] [2022-12-14 06:51:46,979 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:46,979 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:46,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:46,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:46,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:46,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:47,025 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:51:47,025 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:51:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:47,077 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:47,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:47,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:47,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:51:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:47,314 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:51:47,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:51:47,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:47,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:47,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:47,960 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 28 treesize of output 24 [2022-12-14 06:51:47,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:48,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,030 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:48,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:48,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,094 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:48,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-12-14 06:51:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,154 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,226 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,261 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,298 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,359 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:48,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,422 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:51:48,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-12-14 06:51:48,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,471 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,525 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:48,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,561 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,633 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:48,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:48,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,724 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:51:48,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-12-14 06:51:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,788 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,823 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,884 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,914 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,943 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,943 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:48,992 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:48,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,055 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:51:49,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,093 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:49,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,124 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:49,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,186 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:49,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,212 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:49,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:49,234 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:49,234 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:49,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:50,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7634#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:50,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:50,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:50,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-12-14 06:51:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873947056] [2022-12-14 06:51:50,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:50,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:51:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:51:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:51:50,627 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:50,785 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2022-12-14 06:51:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:51:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-12-14 06:51:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:50,787 INFO L225 Difference]: With dead ends: 293 [2022-12-14 06:51:50,787 INFO L226 Difference]: Without dead ends: 234 [2022-12-14 06:51:50,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 307 SyntacticMatches, 103 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:51:50,787 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:50,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:51:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-14 06:51:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-12-14 06:51:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 0 states have call successors, (0), 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 06:51:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2022-12-14 06:51:50,851 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2022-12-14 06:51:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2022-12-14 06:51:50,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2022-12-14 06:51:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 06:51:50,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:50,852 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:50,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:51:51,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:51:51,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2022-12-14 06:51:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:51,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803557606] [2022-12-14 06:51:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:51,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:51,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223090668] [2022-12-14 06:51:51,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:51:51,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:51,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:51,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:51,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:51:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:51,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:51:51,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-12-14 06:51:51,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-12-14 06:51:51,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:51,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803557606] [2022-12-14 06:51:51,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223090668] [2022-12-14 06:51:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223090668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855738940] [2022-12-14 06:51:51,551 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:51,551 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:51,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:51,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:51,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,600 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:51:51,600 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:51:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,653 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:51,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,855 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:51,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:51,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:51,971 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 28 treesize of output 24 [2022-12-14 06:51:52,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,086 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 28 treesize of output 24 [2022-12-14 06:51:52,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:52,176 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:52,177 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 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:52,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:52,366 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:52,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:52,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,499 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,499 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,537 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:52,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:51:52,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,567 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,616 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:52,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,643 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,690 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,691 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,726 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:52,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,758 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,792 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,825 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:52,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,859 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,937 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:52,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,967 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:52,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:52,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,001 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,070 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:53,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:53,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,172 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:51:53,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-12-14 06:51:53,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,234 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,234 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,268 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,320 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,352 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,387 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,437 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,470 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:53,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,503 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:53,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:53,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:51:55,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:51:55,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:51:55,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:51:55,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-12-14 06:51:55,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944842861] [2022-12-14 06:51:55,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:51:55,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 06:51:55,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:55,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 06:51:55,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 06:51:55,488 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:56,327 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2022-12-14 06:51:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 06:51:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 06:51:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:56,329 INFO L225 Difference]: With dead ends: 831 [2022-12-14 06:51:56,329 INFO L226 Difference]: Without dead ends: 664 [2022-12-14 06:51:56,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 303 SyntacticMatches, 90 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=756, Invalid=1406, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:51:56,330 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 939 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:56,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 68 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-12-14 06:51:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2022-12-14 06:51:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 0 states have call successors, (0), 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 06:51:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2022-12-14 06:51:56,441 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2022-12-14 06:51:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:56,441 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2022-12-14 06:51:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2022-12-14 06:51:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-14 06:51:56,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:56,443 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:56,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:56,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:56,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2022-12-14 06:51:56,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:56,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8444453] [2022-12-14 06:51:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:56,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074200877] [2022-12-14 06:51:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:51:56,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:56,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:56,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:51:56,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:51:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:51:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2022-12-14 06:51:57,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:57,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8444453] [2022-12-14 06:51:57,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074200877] [2022-12-14 06:51:57,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074200877] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:57,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:57,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:51:57,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070439554] [2022-12-14 06:51:57,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:57,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:51:57,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:51:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:57,036 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:57,219 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2022-12-14 06:51:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:51:57,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-12-14 06:51:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:57,221 INFO L225 Difference]: With dead ends: 493 [2022-12-14 06:51:57,221 INFO L226 Difference]: Without dead ends: 390 [2022-12-14 06:51:57,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 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 06:51:57,221 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:57,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:51:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-14 06:51:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2022-12-14 06:51:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 0 states have call successors, (0), 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 06:51:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2022-12-14 06:51:57,333 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2022-12-14 06:51:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:57,334 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2022-12-14 06:51:57,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:51:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2022-12-14 06:51:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-12-14 06:51:57,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:57,335 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:57,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:57,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:51:57,536 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2022-12-14 06:51:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804389945] [2022-12-14 06:51:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:57,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:51:57,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436833326] [2022-12-14 06:51:57,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:51:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:57,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:57,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:51:57,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:51:57,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:51:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:51:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-12-14 06:51:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-12-14 06:51:57,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804389945] [2022-12-14 06:51:57,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436833326] [2022-12-14 06:51:57,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436833326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156185551] [2022-12-14 06:51:57,856 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:51:57,856 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:57,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:57,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:57,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:57,903 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:51:57,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:51:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:57,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-12-14 06:51:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:57,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:51:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:58,127 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:51:58,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:51:58,202 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 28 treesize of output 24 [2022-12-14 06:51:58,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:58,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,450 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 28 treesize of output 24 [2022-12-14 06:51:58,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:51:58,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:51:58,689 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:51:58,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:51:58,758 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 28 treesize of output 24 [2022-12-14 06:51:58,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:51:58,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:58,826 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:58,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:58,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:58,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:58,902 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:51:58,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:51:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:58,957 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:58,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,004 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:51:59,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:51:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,031 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,086 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,117 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:59,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:51:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,150 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,184 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,215 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:59,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:51:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,248 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,327 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,404 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:59,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-12-14 06:51:59,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,445 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,476 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,529 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,592 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:59,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:51:59,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,632 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,662 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,720 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:51:59,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:51:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,816 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:51:59,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-12-14 06:51:59,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,892 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,922 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,964 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:51:59,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:51:59,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:59,993 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:51:59,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:52:00,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:00,024 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:00,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:00,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:03,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15355#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:03,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:03,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:52:03,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-14 06:52:03,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308226160] [2022-12-14 06:52:03,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:03,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:52:03,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:52:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:52:03,558 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:03,959 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2022-12-14 06:52:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:52:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2022-12-14 06:52:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:03,961 INFO L225 Difference]: With dead ends: 493 [2022-12-14 06:52:03,961 INFO L226 Difference]: Without dead ends: 358 [2022-12-14 06:52:03,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 527 SyntacticMatches, 187 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:52:03,962 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:03,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-12-14 06:52:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2022-12-14 06:52:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2022-12-14 06:52:04,098 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2022-12-14 06:52:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:04,098 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2022-12-14 06:52:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2022-12-14 06:52:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-12-14 06:52:04,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:04,100 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:04,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:52:04,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:52:04,301 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2022-12-14 06:52:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:04,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255592518] [2022-12-14 06:52:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:04,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:52:04,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822633562] [2022-12-14 06:52:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:52:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:04,467 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:04,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 06:52:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:52:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-12-14 06:52:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-12-14 06:52:05,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255592518] [2022-12-14 06:52:05,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:52:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822633562] [2022-12-14 06:52:05,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822633562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182131052] [2022-12-14 06:52:05,388 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:52:05,388 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:05,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:05,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:05,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:05,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,434 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:52:05,434 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:52:05,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,476 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:52:05,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:52:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:52:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:05,664 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:52:05,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:52:05,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:05,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:05,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:05,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:05,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:05,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:52:05,991 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:52:05,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:52:06,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:06,086 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 28 treesize of output 24 [2022-12-14 06:52:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:52:06,196 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:52:06,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:52:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:06,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,328 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,362 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:06,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:52:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,392 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,436 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:06,436 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:06,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,459 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,514 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,514 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,544 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:06,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:52:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,575 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,575 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,611 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:06,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:06,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,670 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:52:06,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:52:06,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,702 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,777 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:06,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:06,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,876 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:52:06,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-12-14 06:52:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,939 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:06,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:06,980 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:06,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,035 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,066 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,098 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,152 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,227 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:07,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:52:07,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,270 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,306 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,352 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:07,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,401 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:52:07,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:52:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:07,459 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:07,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:07,462 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:12,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18485#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:12,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:12,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:52:12,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-12-14 06:52:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616277213] [2022-12-14 06:52:12,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 06:52:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 06:52:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=2155, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 06:52:12,288 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:14,958 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2022-12-14 06:52:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:52:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-12-14 06:52:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:14,961 INFO L225 Difference]: With dead ends: 1739 [2022-12-14 06:52:14,961 INFO L226 Difference]: Without dead ends: 1439 [2022-12-14 06:52:14,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 504 SyntacticMatches, 186 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15207 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2604, Invalid=4202, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 06:52:14,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1718 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:14,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 140 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:52:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-12-14 06:52:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2022-12-14 06:52:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 0 states have call successors, (0), 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 06:52:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2022-12-14 06:52:15,185 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2022-12-14 06:52:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:15,185 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2022-12-14 06:52:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2022-12-14 06:52:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-12-14 06:52:15,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:15,187 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:15,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 06:52:15,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:52:15,388 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2022-12-14 06:52:15,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878194785] [2022-12-14 06:52:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:15,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:52:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582884409] [2022-12-14 06:52:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:52:15,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:15,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:15,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:15,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 06:52:16,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:52:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:52:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:52:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2022-12-14 06:52:16,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:52:16,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878194785] [2022-12-14 06:52:16,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:52:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582884409] [2022-12-14 06:52:16,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582884409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:16,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:52:16,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:52:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669884161] [2022-12-14 06:52:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:52:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:52:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:52:16,407 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:16,665 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2022-12-14 06:52:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:52:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2022-12-14 06:52:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:16,666 INFO L225 Difference]: With dead ends: 765 [2022-12-14 06:52:16,666 INFO L226 Difference]: Without dead ends: 594 [2022-12-14 06:52:16,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 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 06:52:16,667 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:16,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:52:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-12-14 06:52:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-12-14 06:52:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 0 states have call successors, (0), 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 06:52:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2022-12-14 06:52:16,885 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2022-12-14 06:52:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:16,885 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2022-12-14 06:52:16,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2022-12-14 06:52:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-12-14 06:52:16,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:16,887 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:16,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 06:52:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:52:17,089 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2022-12-14 06:52:17,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:17,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742658247] [2022-12-14 06:52:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:17,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:52:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691621334] [2022-12-14 06:52:17,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:52:17,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:17,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:17,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:17,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 06:52:17,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:52:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:52:17,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:52:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-12-14 06:52:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-12-14 06:52:17,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742658247] [2022-12-14 06:52:17,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:52:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691621334] [2022-12-14 06:52:17,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691621334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419173654] [2022-12-14 06:52:17,602 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:52:17,602 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:17,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:17,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:17,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,641 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:52:17,642 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:52:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,683 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:52:17,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:52:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:52:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:17,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:17,887 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:52:17,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:52:18,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:52:18,311 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 28 treesize of output 24 [2022-12-14 06:52:18,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:52:18,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,535 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:18,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:18,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,585 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:52:18,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-12-14 06:52:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,622 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:18,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,681 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:18,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,705 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:18,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,750 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:18,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,780 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:52:18,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,806 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:18,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,839 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:18,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:18,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,894 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:52:18,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:52:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:18,941 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:18,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,013 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:19,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,127 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:52:19,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-12-14 06:52:19,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,193 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,234 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,234 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,296 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,362 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:19,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-12-14 06:52:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,402 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,438 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,491 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:19,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:19,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,525 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,557 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,557 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,598 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,646 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:52:19,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:52:19,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:19,674 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:19,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:19,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:25,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29541#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:25,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:25,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:52:25,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-14 06:52:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304683064] [2022-12-14 06:52:25,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:52:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:52:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:52:25,087 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 06:52:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:25,660 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2022-12-14 06:52:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:52:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 443 [2022-12-14 06:52:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:25,665 INFO L225 Difference]: With dead ends: 1003 [2022-12-14 06:52:25,665 INFO L226 Difference]: Without dead ends: 812 [2022-12-14 06:52:25,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 930 SyntacticMatches, 379 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:52:25,666 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:25,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-12-14 06:52:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2022-12-14 06:52:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 0 states have call successors, (0), 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 06:52:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2022-12-14 06:52:25,903 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2022-12-14 06:52:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:25,904 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2022-12-14 06:52:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 06:52:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2022-12-14 06:52:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-12-14 06:52:25,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:25,909 INFO L195 NwaCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:25,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 06:52:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:52:26,111 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2022-12-14 06:52:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:26,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963481556] [2022-12-14 06:52:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:26,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:52:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576796026] [2022-12-14 06:52:26,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:52:26,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:26,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:26,250 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:26,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 06:52:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 06:52:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-12-14 06:52:27,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-12-14 06:52:29,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963481556] [2022-12-14 06:52:29,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:52:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576796026] [2022-12-14 06:52:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576796026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503354009] [2022-12-14 06:52:29,441 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:52:29,441 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:29,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:29,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:29,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,496 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:52:29,497 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:52:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,554 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:52:29,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:52:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:52:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:29,841 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:52:29,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:52:29,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:29,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,165 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 28 treesize of output 24 [2022-12-14 06:52:30,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:52:30,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:52:30,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:52:30,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,528 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:30,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,585 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:52:30,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:52:30,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,656 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:30,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:30,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,712 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:30,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,744 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:30,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:30,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,783 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:30,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,837 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:52:30,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:52:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,909 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:52:30,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-12-14 06:52:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,963 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:30,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:30,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,007 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,036 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,065 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,065 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,130 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:31,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,221 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:52:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-12-14 06:52:31,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,277 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,311 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,367 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:31,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,462 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:52:31,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-12-14 06:52:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,527 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,581 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,630 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:52:31,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:52:31,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,725 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:52:31,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-12-14 06:52:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,795 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,795 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,828 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,878 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,911 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:31,941 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:31,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:52:31,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:48,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35410#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:48,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:48,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:52:48,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-12-14 06:52:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288694978] [2022-12-14 06:52:48,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:48,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-14 06:52:48,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-14 06:52:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4998, Invalid=6344, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 06:52:48,068 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:52:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:59,886 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2022-12-14 06:52:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 06:52:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 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 455 [2022-12-14 06:52:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:59,893 INFO L225 Difference]: With dead ends: 4184 [2022-12-14 06:52:59,893 INFO L226 Difference]: Without dead ends: 3627 [2022-12-14 06:52:59,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 864 SyntacticMatches, 394 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62485 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=9745, Invalid=13817, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 06:52:59,897 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4068 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 2197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2197 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:59,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4068 Valid, 284 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2197 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 06:52:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-12-14 06:53:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2022-12-14 06:53:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 0 states have call successors, (0), 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 06:53:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2022-12-14 06:53:00,352 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2022-12-14 06:53:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:00,352 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2022-12-14 06:53:00,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:53:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2022-12-14 06:53:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-12-14 06:53:00,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:00,356 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:53:00,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 06:53:00,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:00,558 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2022-12-14 06:53:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689737322] [2022-12-14 06:53:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:00,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:53:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732380710] [2022-12-14 06:53:00,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:53:00,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:00,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:53:00,837 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:53:00,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 06:53:01,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:53:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:53:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:53:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:53:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-12-14 06:53:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:53:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-12-14 06:53:03,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:03,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689737322] [2022-12-14 06:53:03,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:53:03,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732380710] [2022-12-14 06:53:03,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732380710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:53:03,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817200057] [2022-12-14 06:53:03,699 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:53:03,699 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:53:03,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:53:03,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:53:03,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:53:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:03,755 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:53:03,755 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:53:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:03,812 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:53:03,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:53:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:03,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:53:04,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:04,054 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:53:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:53:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,253 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 24 treesize of output 20 [2022-12-14 06:53:04,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:53:04,512 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:53:04,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:53:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:53:04,755 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:53:04,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:53:04,815 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 28 treesize of output 24 [2022-12-14 06:53:04,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:04,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:04,888 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:04,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:04,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:04,922 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:53:04,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:53:04,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:04,951 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:04,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:04,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:04,997 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:04,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:05,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,025 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,073 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:05,073 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 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:05,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,133 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:53:05,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-12-14 06:53:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,193 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,228 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:05,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,300 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:53:05,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:53:05,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,344 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,344 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,419 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,448 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,449 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,482 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,534 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:05,534 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 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:05,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,628 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:53:05,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-12-14 06:53:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,685 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,686 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,716 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,764 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:05,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,795 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,795 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,830 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,872 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,904 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:53:05,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:53:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:05,940 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:05,943 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:53:13,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50757#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:53:13,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:53:13,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:53:13,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-14 06:53:13,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702317629] [2022-12-14 06:53:13,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:53:13,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:53:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:53:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:53:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:53:13,480 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:53:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:53:14,001 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2022-12-14 06:53:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:53:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 839 [2022-12-14 06:53:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:53:14,003 INFO L225 Difference]: With dead ends: 1449 [2022-12-14 06:53:14,003 INFO L226 Difference]: Without dead ends: 1139 [2022-12-14 06:53:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 1739 SyntacticMatches, 762 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:53:14,004 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:53:14,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:53:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-12-14 06:53:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2022-12-14 06:53:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 0 states have call successors, (0), 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 06:53:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2022-12-14 06:53:14,455 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2022-12-14 06:53:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:14,456 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2022-12-14 06:53:14,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:53:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2022-12-14 06:53:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2022-12-14 06:53:14,460 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:14,460 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:53:14,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 06:53:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 06:53:14,661 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2022-12-14 06:53:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550126946] [2022-12-14 06:53:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:15,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:53:15,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110181485] [2022-12-14 06:53:15,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:53:15,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:15,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:53:15,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:53:15,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 06:53:16,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:53:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:53:16,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:53:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:53:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-12-14 06:53:16,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:53:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-12-14 06:53:16,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:16,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550126946] [2022-12-14 06:53:16,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:53:16,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110181485] [2022-12-14 06:53:16,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110181485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:53:16,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687258542] [2022-12-14 06:53:16,375 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:53:16,375 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:53:16,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:53:16,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:53:16,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:53:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,428 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:53:16,429 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:53:16,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,485 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:53:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:53:16,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:53:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:16,711 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:53:16,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:53:16,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:16,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:16,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:16,993 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 28 treesize of output 24 [2022-12-14 06:53:17,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:53:17,104 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:53:17,104 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 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:53:17,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:17,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:17,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:53:17,322 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:53:17,323 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 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:53:17,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:17,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,477 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,514 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:53:17,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:53:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,552 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,609 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,645 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,685 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,686 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,744 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,778 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:53:17,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:53:17,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,812 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:17,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,845 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:17,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:17,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,912 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:53:17,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:53:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:17,955 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:17,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,023 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,050 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,051 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,081 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,139 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:18,139 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 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,171 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,204 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,204 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,251 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,282 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,314 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,359 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:18,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:18,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,428 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:53:18,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:53:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:18,502 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:18,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:18,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:53:31,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60722#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:53:31,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:53:31,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:53:31,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-14 06:53:31,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068659284] [2022-12-14 06:53:31,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:53:31,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:53:31,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:53:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:53:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:53:31,927 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 06:53:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:53:32,885 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2022-12-14 06:53:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:53:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 844 [2022-12-14 06:53:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:53:32,888 INFO L225 Difference]: With dead ends: 1567 [2022-12-14 06:53:32,888 INFO L226 Difference]: Without dead ends: 1198 [2022-12-14 06:53:32,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 1744 SyntacticMatches, 763 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10446 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=401, Invalid=1321, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:53:32,889 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:53:32,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:53:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-12-14 06:53:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2022-12-14 06:53:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 0 states have call successors, (0), 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 06:53:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2022-12-14 06:53:33,400 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2022-12-14 06:53:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:33,400 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2022-12-14 06:53:33,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 06:53:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2022-12-14 06:53:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-12-14 06:53:33,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:33,404 INFO L195 NwaCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:53:33,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 06:53:33,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:33,606 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2022-12-14 06:53:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926381093] [2022-12-14 06:53:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:33,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:33,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:53:33,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552536089] [2022-12-14 06:53:33,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:53:33,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:53:33,795 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:53:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 06:53:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 7246 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 06:53:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:53:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-12-14 06:53:38,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:53:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-12-14 06:53:44,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926381093] [2022-12-14 06:53:44,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:53:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552536089] [2022-12-14 06:53:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552536089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:53:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274816757] [2022-12-14 06:53:44,004 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:53:44,004 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:53:44,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:53:44,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:53:44,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:53:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,046 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:53:44,046 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:53:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,082 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:53:44,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:53:44,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:53:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:53:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:44,277 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:53:44,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:53:44,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:53:44,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:53:44,732 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 28 treesize of output 24 [2022-12-14 06:53:44,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:53:44,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:53:44,920 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 28 treesize of output 24 [2022-12-14 06:53:44,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:44,958 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:44,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:44,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:44,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,009 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:53:45,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:53:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,084 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,129 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,161 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,190 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,239 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,270 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:53:45,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:53:45,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,299 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,334 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:45,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:45,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,390 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:53:45,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 06:53:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,446 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,446 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,537 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:45,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:45,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,622 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:53:45,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-12-14 06:53:45,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,664 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,695 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,746 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:45,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,838 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:53:45,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-12-14 06:53:45,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,900 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,931 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:45,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:45,981 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:53:45,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:53:46,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,010 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:46,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:46,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,043 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:46,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,084 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:53:46,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:53:46,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,137 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:53:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:53:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:53:46,180 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:53:46,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:53:46,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:54:44,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71202#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:54:44,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:54:44,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:54:44,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-12-14 06:54:44,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173986230] [2022-12-14 06:54:44,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:54:44,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-12-14 06:54:44,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:54:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-12-14 06:54:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2022-12-14 06:54:44,866 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:56:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:20,911 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2022-12-14 06:56:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-12-14 06:56:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2022-12-14 06:56:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:20,928 INFO L225 Difference]: With dead ends: 9848 [2022-12-14 06:56:20,928 INFO L226 Difference]: Without dead ends: 8785 [2022-12-14 06:56:20,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 1578 SyntacticMatches, 762 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240567 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2022-12-14 06:56:20,934 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7165 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 3192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7165 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3192 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:20,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7165 Valid, 572 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3192 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 06:56:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-12-14 06:56:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2022-12-14 06:56:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.1096570397111913) internal successors, (2459), 2216 states have internal predecessors, (2459), 0 states have call successors, (0), 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 06:56:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2022-12-14 06:56:21,895 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2022-12-14 06:56:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:21,896 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2022-12-14 06:56:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:56:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2022-12-14 06:56:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-12-14 06:56:21,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:21,908 INFO L195 NwaCegarLoop]: trace histogram [1520, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:21,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 06:56:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:22,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2022-12-14 06:56:22,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:22,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302083872] [2022-12-14 06:56:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:22,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:22,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:56:22,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859806657] [2022-12-14 06:56:22,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:56:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:22,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 06:56:23,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:56:23,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:56:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:56:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-12-14 06:56:25,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:56:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-12-14 06:56:26,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302083872] [2022-12-14 06:56:26,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:56:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859806657] [2022-12-14 06:56:26,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859806657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:56:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911477847] [2022-12-14 06:56:26,788 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:56:26,788 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:56:26,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:56:26,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:56:26,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:56:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:26,832 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:56:26,832 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:56:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:26,913 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:56:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:56:26,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:26,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 06:56:27,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:27,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,132 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-12-14 06:56:27,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-12-14 06:56:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,410 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 28 treesize of output 24 [2022-12-14 06:56:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:56:27,536 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 06:56:27,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-12-14 06:56:27,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,641 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 28 treesize of output 24 [2022-12-14 06:56:27,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:56:27,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:27,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,872 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:27,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,906 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:56:27,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:56:27,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,942 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:27,943 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:27,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:27,993 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:27,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,031 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,064 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,122 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,158 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:56:28,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:56:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,191 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,226 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:56:28,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:56:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,285 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:56:28,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:56:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,322 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,323 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,396 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:56:28,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:56:28,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,497 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-12-14 06:56:28,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-12-14 06:56:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,576 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,608 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,661 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,695 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,728 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,777 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,811 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,811 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,844 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:28,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,887 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:56:28,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:56:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:28,941 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:56:28,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:56:29,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:29,010 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:29,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:29,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:56:43,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104370#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:56:43,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:56:43,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:56:43,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 06:56:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904301751] [2022-12-14 06:56:43,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:56:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:56:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:56:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:56:43,904 INFO L87 Difference]: Start difference. First operand 2217 states and 2459 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:56:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:44,885 INFO L93 Difference]: Finished difference Result 2878 states and 3342 transitions. [2022-12-14 06:56:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:56:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 1616 [2022-12-14 06:56:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:44,889 INFO L225 Difference]: With dead ends: 2878 [2022-12-14 06:56:44,889 INFO L226 Difference]: Without dead ends: 2213 [2022-12-14 06:56:44,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4848 GetRequests, 3300 SyntacticMatches, 1530 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10839 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:56:44,890 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:44,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 20 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:56:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-12-14 06:56:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2204. [2022-12-14 06:56:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.1030413073082161) internal successors, (2430), 2203 states have internal predecessors, (2430), 0 states have call successors, (0), 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 06:56:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2430 transitions. [2022-12-14 06:56:45,799 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2430 transitions. Word has length 1616 [2022-12-14 06:56:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:45,800 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 2430 transitions. [2022-12-14 06:56:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 06:56:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2430 transitions. [2022-12-14 06:56:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2022-12-14 06:56:45,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:45,820 INFO L195 NwaCegarLoop]: trace histogram [1520, 32, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:45,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 06:56:46,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 06:56:46,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash -816145346, now seen corresponding path program 18 times [2022-12-14 06:56:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:46,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929222513] [2022-12-14 06:56:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:46,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:56:46,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623036933] [2022-12-14 06:56:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:56:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:46,424 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:46,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 06:56:47,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:56:47,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:56:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:56:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-12-14 06:56:47,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:56:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-12-14 06:56:48,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929222513] [2022-12-14 06:56:48,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:56:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623036933] [2022-12-14 06:56:48,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623036933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:56:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088060705] [2022-12-14 06:56:48,033 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:56:48,033 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:56:48,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:56:48,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:56:48,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:56:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,076 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:56:48,077 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:56:48,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,124 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:56:48,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:56:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:56:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:56:48,342 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:56:48,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:56:48,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:56:48,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:56:48,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:56:48,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:48,980 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:56:48,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:56:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,039 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-12-14 06:56:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-12-14 06:56:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,088 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,136 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:56:49,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:56:49,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,164 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,211 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,243 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:56:49,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-12-14 06:56:49,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,273 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,305 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,336 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:56:49,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:56:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,366 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,443 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,443 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,472 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,504 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,555 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:56:49,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:56:49,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,585 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,618 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,667 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:56:49,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:56:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,695 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,729 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,769 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:56:49,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:56:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,824 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:56:49,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:56:49,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:56:49,869 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:56:49,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:56:49,873 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:57:15,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123772#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 06:57:15,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:57:15,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:57:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-14 06:57:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048350081] [2022-12-14 06:57:15,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:57:15,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:57:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:57:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:57:15,835 INFO L87 Difference]: Start difference. First operand 2204 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 06:57:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:18,909 INFO L93 Difference]: Finished difference Result 7531 states and 8391 transitions. [2022-12-14 06:57:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 06:57:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 1633 [2022-12-14 06:57:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:18,922 INFO L225 Difference]: With dead ends: 7531 [2022-12-14 06:57:18,922 INFO L226 Difference]: Without dead ends: 6887 [2022-12-14 06:57:18,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4928 GetRequests, 3353 SyntacticMatches, 1530 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28285 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:57:18,924 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 77 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:57:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-12-14 06:57:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2252. [2022-12-14 06:57:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.104398045313194) internal successors, (2486), 2251 states have internal predecessors, (2486), 0 states have call successors, (0), 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 06:57:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2486 transitions. [2022-12-14 06:57:20,087 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2486 transitions. Word has length 1633 [2022-12-14 06:57:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:20,088 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 2486 transitions. [2022-12-14 06:57:20,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 06:57:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2486 transitions. [2022-12-14 06:57:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2022-12-14 06:57:20,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:20,101 INFO L195 NwaCegarLoop]: trace histogram [1520, 64, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:20,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 06:57:20,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:20,302 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1937700894, now seen corresponding path program 19 times [2022-12-14 06:57:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757706075] [2022-12-14 06:57:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:20,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:57:20,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517123662] [2022-12-14 06:57:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:57:20,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:20,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:20,624 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:20,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a17d76-e1da-46e7-b06e-f2a827d2daff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 06:57:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:23,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 14541 conjuncts, 193 conjunts are in the unsatisfiable core [2022-12-14 06:57:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-12-14 06:57:33,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-12-14 06:57:53,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757706075] [2022-12-14 06:57:53,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:57:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517123662] [2022-12-14 06:57:53,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517123662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183309344] [2022-12-14 06:57:53,137 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:57:53,137 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:57:53,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:57:53,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:57:53,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:57:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,177 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-12-14 06:57:53,178 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 06:57:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,225 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 06:57:53,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 06:57:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-12-14 06:57:53,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:53,433 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 06:57:53,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-12-14 06:57:53,512 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 28 treesize of output 24 [2022-12-14 06:57:53,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:53,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 06:57:53,682 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 28 treesize of output 24 [2022-12-14 06:57:53,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:53,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:53,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:57:53,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:53,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:53,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:54,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2022-12-14 06:57:54,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:54,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-12-14 06:57:54,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,143 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,184 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:57:54,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-12-14 06:57:54,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,222 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,222 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,277 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:57:54,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:57:54,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,311 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,367 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:57:54,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:57:54,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,432 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:57:54,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-12-14 06:57:54,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,497 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,537 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,572 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:57:54,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-12-14 06:57:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,607 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,692 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,761 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-12-14 06:57:54,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-12-14 06:57:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,804 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,858 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,911 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:57:54,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:57:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,939 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:54,971 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:54,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,024 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-12-14 06:57:55,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 06:57:55,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,127 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-12-14 06:57:55,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-12-14 06:57:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,175 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:55,176 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:55,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,205 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:55,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:55,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,253 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-12-14 06:57:55,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-12-14 06:57:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,315 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-12-14 06:57:55,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 06:57:55,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:55,361 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:57:55,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-12-14 06:57:55,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:32,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152890#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:32,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:32,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:01:32,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2022-12-14 07:01:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902654153] [2022-12-14 07:01:32,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-12-14 07:01:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-12-14 07:01:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75137, Invalid=81283, Unknown=0, NotChecked=0, Total=156420 [2022-12-14 07:01:32,995 INFO L87 Difference]: Start difference. First operand 2252 states and 2486 transitions. Second operand has 386 states, 386 states have (on average 1.0647668393782384) internal successors, (411), 385 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)