./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcomp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P --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 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:49,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:49,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:49,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:49,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:49,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:49,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:49,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:49,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:49,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:49,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:49,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:49,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:49,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:49,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:49,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:49,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:49,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:49,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:49,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:49,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:49,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:49,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:49,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:49,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:49,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:49,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:49,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:49,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:49,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:49,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:49,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:49,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:49,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:49,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:49,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:49,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:49,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:49,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:49,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:49,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:49,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:51:49,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:49,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:49,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:49,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:49,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:49,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:49,422 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:49,422 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:49,422 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:49,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:51:49,423 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:49,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:49,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:51:49,423 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:51:49,424 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:49,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:51:49,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:51:49,424 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:51:49,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:49,426 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:49,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:49,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:49,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:49,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:51:49,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:49,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:51:49,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:49,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:51:49,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:49,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:51:49,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:49,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:49,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:49,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:49,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:49,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:51:49,430 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:51:49,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:51:49,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:51:49,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:49,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:49,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 [2021-11-20 22:51:49,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:49,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:49,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:49,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:49,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:49,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/ifcomp.c [2021-11-20 22:51:49,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/data/03eb80d2b/9c4f834475064b539cb1762174b97702/FLAGf3168ea62 [2021-11-20 22:51:50,258 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:50,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/sv-benchmarks/c/array-fpi/ifcomp.c [2021-11-20 22:51:50,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/data/03eb80d2b/9c4f834475064b539cb1762174b97702/FLAGf3168ea62 [2021-11-20 22:51:50,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/data/03eb80d2b/9c4f834475064b539cb1762174b97702 [2021-11-20 22:51:50,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:50,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:50,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:50,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:50,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:50,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5ec4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50, skipping insertion in model container [2021-11-20 22:51:50,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:50,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:50,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/sv-benchmarks/c/array-fpi/ifcomp.c[589,602] [2021-11-20 22:51:50,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:50,881 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:50,893 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/sv-benchmarks/c/array-fpi/ifcomp.c[589,602] [2021-11-20 22:51:50,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:50,917 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:50,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50 WrapperNode [2021-11-20 22:51:50,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:50,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:50,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:50,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:50,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,972 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2021-11-20 22:51:50,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:50,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:50,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:50,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:50,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:50,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:51,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:51,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:51,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:51,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:51,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:51,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:51,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (1/1) ... [2021-11-20 22:51:51,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:51,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:51,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:51:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:51:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:51:51,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:51,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:51,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:51:51,203 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:51,205 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:51,447 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:51,521 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:51,521 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 22:51:51,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:51 BoogieIcfgContainer [2021-11-20 22:51:51,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:51,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:51,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:51,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:51,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:50" (1/3) ... [2021-11-20 22:51:51,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bcaeef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:51, skipping insertion in model container [2021-11-20 22:51:51,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:50" (2/3) ... [2021-11-20 22:51:51,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bcaeef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:51, skipping insertion in model container [2021-11-20 22:51:51,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:51" (3/3) ... [2021-11-20 22:51:51,543 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcomp.c [2021-11-20 22:51:51,548 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:51,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:51:51,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:51,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:51,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:51:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:51:51,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:51,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:51,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1718302181, now seen corresponding path program 1 times [2021-11-20 22:51:51,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:51,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555296046] [2021-11-20 22:51:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:51,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:51,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:51,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555296046] [2021-11-20 22:51:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555296046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:51,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:51,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:51,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297805347] [2021-11-20 22:51:51,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:51,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:51,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:51,865 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:51,938 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-11-20 22:51:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 22:51:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:51,948 INFO L225 Difference]: With dead ends: 22 [2021-11-20 22:51:51,948 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 22:51:51,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:51,955 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:51,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 22:51:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 22:51:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-11-20 22:51:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-20 22:51:51,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2021-11-20 22:51:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:51,987 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-20 22:51:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-20 22:51:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 22:51:51,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:51,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:51,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:51:51,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash -278726234, now seen corresponding path program 1 times [2021-11-20 22:51:51,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:51,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775546356] [2021-11-20 22:51:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:51,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:52,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540713297] [2021-11-20 22:51:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:52,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:52,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:51:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:51:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:51:52,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:52,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775546356] [2021-11-20 22:51:52,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540713297] [2021-11-20 22:51:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540713297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:52,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:52,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:51:52,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896190587] [2021-11-20 22:51:52,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:52,154 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-20 22:51:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:52,223 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-20 22:51:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2021-11-20 22:51:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:52,224 INFO L225 Difference]: With dead ends: 24 [2021-11-20 22:51:52,224 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 22:51:52,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:52,227 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:52,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 22:51:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-20 22:51:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-20 22:51:52,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-11-20 22:51:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-20 22:51:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-20 22:51:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-20 22:51:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:51:52,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:52,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:52,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:52,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:52,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1790599809, now seen corresponding path program 1 times [2021-11-20 22:51:52,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:52,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141987281] [2021-11-20 22:51:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:52,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:52,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917481546] [2021-11-20 22:51:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:52,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:52,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:52,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:51:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 22:51:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:51:52,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:54,316 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 22:51:54,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 263 treesize of output 738 [2021-11-20 22:51:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,208 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-20 22:51:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 203 [2021-11-20 22:51:55,592 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-20 22:51:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 840 treesize of output 703 [2021-11-20 22:51:55,827 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-20 22:51:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 894 treesize of output 810 [2021-11-20 22:51:56,074 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-20 22:51:56,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 944 treesize of output 866 [2021-11-20 22:51:56,412 INFO L354 Elim1Store]: treesize reduction 196, result has 44.0 percent of original size [2021-11-20 22:51:56,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 897 treesize of output 808 [2021-11-20 22:52:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:52:07,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141987281] [2021-11-20 22:52:07,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:52:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917481546] [2021-11-20 22:52:07,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917481546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:07,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884863076] [2021-11-20 22:52:07,820 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 22:52:07,821 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:52:07,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:52:07,830 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:52:07,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:52:08,110 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-20 22:52:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-20 22:52:08,358 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 22:52:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 22:52:08,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,716 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 22:52:08,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 22:52:08,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 22:52:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,962 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 22:52:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 57 [2021-11-20 22:52:08,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:08,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:08,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 79 [2021-11-20 22:52:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 52 [2021-11-20 22:52:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:09,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 132 [2021-11-20 22:52:09,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 22:52:09,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,642 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:52:09,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 22:52:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,838 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:52:09,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 203 treesize of output 132 [2021-11-20 22:52:09,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,901 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:09,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 281 treesize of output 183 [2021-11-20 22:52:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,937 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 144 [2021-11-20 22:52:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:09,965 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 172 treesize of output 98 [2021-11-20 22:52:10,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,068 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 22:52:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 104 [2021-11-20 22:52:10,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:10,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:52:10,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:52:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,536 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:52:10,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 22:52:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,710 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:10,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 94 [2021-11-20 22:52:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,797 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:10,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 129 [2021-11-20 22:52:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:10,985 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 140 [2021-11-20 22:52:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:11,214 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 22:52:11,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 660 treesize of output 499 [2021-11-20 22:52:11,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:11,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:11,257 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 22:52:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 547 treesize of output 313 [2021-11-20 22:52:11,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:11,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:11,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:11,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:52:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:52:11,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:11,921 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:52:12,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:52:12,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:52:12,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 22:52:12,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559849953] [2021-11-20 22:52:12,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:12,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:52:12,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:52:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:52:12,131 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:12,269 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-20 22:52:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 11 [2021-11-20 22:52:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:12,270 INFO L225 Difference]: With dead ends: 30 [2021-11-20 22:52:12,270 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 22:52:12,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:52:12,272 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:12,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:52:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 22:52:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2021-11-20 22:52:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-20 22:52:12,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2021-11-20 22:52:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-20 22:52:12,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-20 22:52:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 22:52:12,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:12,278 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:12,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:12,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 22:52:12,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 321688004, now seen corresponding path program 2 times [2021-11-20 22:52:12,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064369181] [2021-11-20 22:52:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:12,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:12,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:52:12,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515558568] [2021-11-20 22:52:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:52:12,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:12,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:12,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:52:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:52:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:52:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:52:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:12,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:12,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064369181] [2021-11-20 22:52:12,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:52:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515558568] [2021-11-20 22:52:12,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515558568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318012814] [2021-11-20 22:52:12,728 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 22:52:12,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:52:12,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:52:12,728 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:52:12,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:52:12,960 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-20 22:52:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-20 22:52:13,280 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 22:52:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 22:52:13,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,615 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 22:52:13,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 22:52:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 22:52:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:13,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 22:52:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 49 [2021-11-20 22:52:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,944 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 22:52:13,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 208 [2021-11-20 22:52:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:13,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 210 treesize of output 134 [2021-11-20 22:52:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 22:52:14,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:14,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:14,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,589 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:52:14,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 22:52:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,839 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 96 [2021-11-20 22:52:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,953 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:52:14,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 203 treesize of output 132 [2021-11-20 22:52:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,002 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:15,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 275 [2021-11-20 22:52:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,071 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 324 treesize of output 214 [2021-11-20 22:52:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,139 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 161 treesize of output 83 [2021-11-20 22:52:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:15,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,339 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:52:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:52:15,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:15,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,641 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:52:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 22:52:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,849 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 110 [2021-11-20 22:52:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,903 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:52:15,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 270 treesize of output 164 [2021-11-20 22:52:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:15,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:15,999 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 129 [2021-11-20 22:52:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:16,117 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:52:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 279 treesize of output 175 [2021-11-20 22:52:16,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:16,287 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 22:52:16,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 406 treesize of output 251 [2021-11-20 22:52:16,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:16,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:16,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:52:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:52:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:16,945 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:52:17,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:52:17,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:52:17,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 22:52:17,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295813959] [2021-11-20 22:52:17,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:17,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:52:17,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:17,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:52:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:52:17,257 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:17,360 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-11-20 22:52:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 22:52:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:17,362 INFO L225 Difference]: With dead ends: 45 [2021-11-20 22:52:17,362 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 22:52:17,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:52:17,364 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:17,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:52:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 22:52:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2021-11-20 22:52:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-20 22:52:17,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2021-11-20 22:52:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:17,369 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-20 22:52:17,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-20 22:52:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 22:52:17,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:17,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:17,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 22:52:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:17,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 944515365, now seen corresponding path program 3 times [2021-11-20 22:52:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600780207] [2021-11-20 22:52:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:17,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:17,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:52:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236939250] [2021-11-20 22:52:17,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:52:17,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:17,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:17,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:52:17,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:52:17,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:52:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:52:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:17,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:52:17,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 22:52:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:52:18,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:19,444 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 22:52:19,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 298 treesize of output 773 [2021-11-20 22:52:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:19,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:19,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:19,894 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-20 22:52:19,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 203 [2021-11-20 22:52:42,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:42,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 431 treesize of output 423 [2021-11-20 22:52:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 59 [2021-11-20 22:52:42,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 86 [2021-11-20 22:52:42,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:42,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 59 [2021-11-20 22:52:45,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:45,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:45,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 1167 treesize of output 1343 [2021-11-20 22:53:16,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:53:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 713 treesize of output 683 [2021-11-20 22:53:16,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:16,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:16,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:16,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 224 [2021-11-20 22:53:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:53:24,826 INFO L354 Elim1Store]: treesize reduction 154, result has 56.4 percent of original size [2021-11-20 22:53:24,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 1347 treesize of output 1234 [2021-11-20 22:54:06,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:54:06,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1312 treesize of output 1282 [2021-11-20 22:54:07,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:54:07,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1282 treesize of output 1226 [2021-11-20 22:54:07,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 65 [2021-11-20 22:54:07,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:07,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:07,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:07,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:08,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:08,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 67 [2021-11-20 22:54:14,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:14,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:14,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:15,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:15,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 65 [2021-11-20 22:54:15,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:15,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:15,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:15,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 67 [2021-11-20 22:54:15,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:15,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:54:32,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 239 [2021-11-20 22:54:32,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:32,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 238 [2021-11-20 22:54:36,665 INFO L354 Elim1Store]: treesize reduction 337, result has 44.1 percent of original size [2021-11-20 22:54:36,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 825 treesize of output 926 [2021-11-20 22:54:37,226 INFO L354 Elim1Store]: treesize reduction 258, result has 43.5 percent of original size [2021-11-20 22:54:37,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 1048 treesize of output 1071 [2021-11-20 22:54:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:54:46,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600780207] [2021-11-20 22:54:46,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:54:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236939250] [2021-11-20 22:54:46,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236939250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647544744] [2021-11-20 22:54:46,219 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 22:54:46,219 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:46,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:46,220 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:46,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:46,536 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-20 22:54:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-20 22:54:46,828 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 22:54:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 22:54:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:47,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,167 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 22:54:47,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 22:54:47,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 22:54:47,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 135 [2021-11-20 22:54:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:47,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 22:54:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:54:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 317 [2021-11-20 22:54:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:47,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:54:47,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 184 [2021-11-20 22:54:48,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 22:54:48,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:48,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,455 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:54:48,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 22:54:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,728 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:54:48,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 183 treesize of output 116 [2021-11-20 22:54:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:48,797 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 109 [2021-11-20 22:54:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,047 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 464 treesize of output 324 [2021-11-20 22:54:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,184 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:54:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 376 treesize of output 207 [2021-11-20 22:54:49,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,255 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 22:54:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 86 [2021-11-20 22:54:49,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:49,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:54:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,765 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:54:49,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 22:54:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:49,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,006 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 66 [2021-11-20 22:54:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,157 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:54:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 166 treesize of output 99 [2021-11-20 22:54:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,195 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 251 [2021-11-20 22:54:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,333 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 22:54:50,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 347 treesize of output 218 [2021-11-20 22:54:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,392 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:50,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 168 treesize of output 70 [2021-11-20 22:54:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:50,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:50,579 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:54:50,875 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:54:51,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:54:51,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:54:51,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-20 22:54:51,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920876590] [2021-11-20 22:54:51,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:54:51,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:54:51,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:54:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:54:51,090 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:52,061 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-20 22:54:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:54:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 22:54:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:52,062 INFO L225 Difference]: With dead ends: 25 [2021-11-20 22:54:52,063 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 22:54:52,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:54:52,064 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:52,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-11-20 22:54:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 22:54:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-20 22:54:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-20 22:54:52,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2021-11-20 22:54:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:52,069 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-20 22:54:52,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-20 22:54:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 22:54:52,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:52,070 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:52,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:54:52,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:52,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1303797829, now seen corresponding path program 4 times [2021-11-20 22:54:52,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:52,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641726767] [2021-11-20 22:54:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:52,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:52,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:54:52,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696095503] [2021-11-20 22:54:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:54:52,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:52,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:52,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:54:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:54:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:54:52,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:54:52,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641726767] [2021-11-20 22:54:52,494 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:54:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696095503] [2021-11-20 22:54:52,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696095503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:52,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301256076] [2021-11-20 22:54:52,499 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 22:54:52,499 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:52,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:52,500 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:52,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:52,781 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-20 22:54:52,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-20 22:54:53,152 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 22:54:53,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 22:54:53,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:53,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,557 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 22:54:53,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 22:54:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 51 [2021-11-20 22:54:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,836 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 22:54:53,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 58 [2021-11-20 22:54:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 145 [2021-11-20 22:54:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,917 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 22:54:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 144 [2021-11-20 22:54:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:53,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 52 [2021-11-20 22:54:54,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 22:54:54,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:54,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:54,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,448 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:54:54,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 22:54:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,694 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:54,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 112 [2021-11-20 22:54:54,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,859 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:54:54,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 129 [2021-11-20 22:54:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:54,932 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:54,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 424 treesize of output 326 [2021-11-20 22:54:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,046 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 346 treesize of output 231 [2021-11-20 22:54:55,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,127 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 22:54:55,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 86 [2021-11-20 22:54:55,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:55,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,326 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:54:55,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:55,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,618 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 22:54:55,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 22:54:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:55,847 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:55,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 83 [2021-11-20 22:54:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,144 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 109 [2021-11-20 22:54:56,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,570 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 22:54:56,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 568 treesize of output 386 [2021-11-20 22:54:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,833 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:54:56,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 557 treesize of output 447 [2021-11-20 22:54:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:56,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:56,975 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 22:54:56,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 393 treesize of output 201 [2021-11-20 22:54:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:57,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 22:54:57,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:57,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:54:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:57,514 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:54:57,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:54:57,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:54:57,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 22:54:57,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106079894] [2021-11-20 22:54:57,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:54:57,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:54:57,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:54:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:54:57,721 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:58,015 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-11-20 22:54:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:54:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 16 [2021-11-20 22:54:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:58,017 INFO L225 Difference]: With dead ends: 65 [2021-11-20 22:54:58,018 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 22:54:58,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-20 22:54:58,019 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:58,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:54:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 22:54:58,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2021-11-20 22:54:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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) [2021-11-20 22:54:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-20 22:54:58,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2021-11-20 22:54:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:58,028 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-20 22:54:58,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-20 22:54:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 22:54:58,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:58,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:58,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 22:54:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:58,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1731625634, now seen corresponding path program 1 times [2021-11-20 22:54:58,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225422526] [2021-11-20 22:54:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:58,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:58,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:54:58,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357077164] [2021-11-20 22:54:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:58,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:58,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:58,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:54:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 22:54:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-20 22:54:58,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:58,695 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 22:54:58,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-11-20 22:54:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 22:54:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:58,782 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:54:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-20 22:54:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:54:58,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:08,463 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 254 DAG size of output: 151 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 22:55:08,463 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-20 22:55:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 389 treesize of output 864 [2021-11-20 22:55:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:09,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:10,118 INFO L354 Elim1Store]: treesize reduction 56, result has 42.3 percent of original size [2021-11-20 22:55:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 145 treesize of output 143 [2021-11-20 22:55:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:10,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:10,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:12,010 INFO L354 Elim1Store]: treesize reduction 127, result has 24.4 percent of original size [2021-11-20 22:55:12,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 173 treesize of output 159 [2021-11-20 22:55:15,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2021-11-20 22:55:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 87 [2021-11-20 22:55:19,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,705 INFO L354 Elim1Store]: treesize reduction 111, result has 27.0 percent of original size [2021-11-20 22:55:19,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 188 [2021-11-20 22:55:19,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 98 [2021-11-20 22:58:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:51,474 INFO L354 Elim1Store]: treesize reduction 130, result has 59.0 percent of original size [2021-11-20 22:58:51,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 847 treesize of output 902 [2021-11-20 22:59:22,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:22,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:59:25,629 INFO L354 Elim1Store]: treesize reduction 130, result has 59.0 percent of original size [2021-11-20 22:59:25,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 810 treesize of output 850 [2021-11-20 23:00:32,275 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 143 DAG size of output: 83 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:00:32,275 INFO L354 Elim1Store]: treesize reduction 385, result has 40.6 percent of original size [2021-11-20 23:00:32,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1330 treesize of output 1382 [2021-11-20 23:00:33,324 INFO L354 Elim1Store]: treesize reduction 337, result has 48.0 percent of original size [2021-11-20 23:00:33,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1384 treesize of output 1404 [2021-11-20 23:02:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:02:28,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:02:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225422526] [2021-11-20 23:02:28,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:02:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357077164] [2021-11-20 23:02:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357077164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:02:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14166314] [2021-11-20 23:02:28,096 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-20 23:02:28,096 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:02:28,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:02:28,097 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:02:28,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:02:28,365 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 23:02:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 23:02:28,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-20 23:02:28,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-20 23:02:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,325 INFO L354 Elim1Store]: treesize reduction 266, result has 12.2 percent of original size [2021-11-20 23:02:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 545 treesize of output 709 [2021-11-20 23:02:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 67 [2021-11-20 23:02:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:29,664 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 23:02:29,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 540 treesize of output 434 [2021-11-20 23:02:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:30,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:30,762 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 23:02:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 390 treesize of output 320 [2021-11-20 23:02:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,524 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 23:02:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 552 treesize of output 448 [2021-11-20 23:02:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:32,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 66 [2021-11-20 23:02:33,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:33,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 23:02:33,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:33,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:34,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,173 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:02:34,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:02:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,399 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:34,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 94 [2021-11-20 23:02:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,481 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:02:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 160 [2021-11-20 23:02:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,638 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:34,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 94 [2021-11-20 23:02:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,746 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:34,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 80 [2021-11-20 23:02:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:34,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:34,907 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 23:02:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 98 [2021-11-20 23:02:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:35,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,243 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:02:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:02:35,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,539 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:02:35,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 23:02:35,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:35,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:35,963 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:35,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 99 [2021-11-20 23:02:36,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,337 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:02:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 129 [2021-11-20 23:02:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,501 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:36,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 275 treesize of output 177 [2021-11-20 23:02:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:36,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:36,959 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:36,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 583 treesize of output 359 [2021-11-20 23:02:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:37,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:37,252 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:02:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 390 treesize of output 211 [2021-11-20 23:02:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:37,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:37,575 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:02:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:02:37,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:39,368 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:02:40,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:02:40,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:02:40,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 23:02:40,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025683595] [2021-11-20 23:02:40,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:02:40,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:02:40,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:02:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:02:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:02:40,065 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2021-11-20 23:02:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:02:46,044 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-11-20 23:02:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 23:02:46,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) Word has length 17 [2021-11-20 23:02:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:02:46,051 INFO L225 Difference]: With dead ends: 83 [2021-11-20 23:02:46,051 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 23:02:46,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 23:02:46,054 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:02:46,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 77 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 149 Invalid, 0 Unknown, 34 Unchecked, 2.2s Time] [2021-11-20 23:02:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 23:02:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-11-20 23:02:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 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) [2021-11-20 23:02:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-20 23:02:46,065 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2021-11-20 23:02:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:02:46,066 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-20 23:02:46,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2021-11-20 23:02:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-20 23:02:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:02:46,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:02:46,067 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:02:46,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:02:46,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:02:46,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:02:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:02:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2057325180, now seen corresponding path program 5 times [2021-11-20 23:02:46,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:02:46,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396319844] [2021-11-20 23:02:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:02:46,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:02:46,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:02:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473849954] [2021-11-20 23:02:46,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:02:46,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:02:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:02:46,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:02:46,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:02:46,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:02:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:02:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:02:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:02:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:02:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:02:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:02:47,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:02:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396319844] [2021-11-20 23:02:47,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:02:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473849954] [2021-11-20 23:02:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473849954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:02:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119847416] [2021-11-20 23:02:47,025 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:02:47,025 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:02:47,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:02:47,026 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:02:47,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:02:47,318 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-20 23:02:47,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-20 23:02:47,710 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-20 23:02:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-20 23:02:47,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,143 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-20 23:02:48,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 344 [2021-11-20 23:02:48,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 23:02:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:48,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2021-11-20 23:02:48,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,447 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 23:02:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 173 [2021-11-20 23:02:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 70 [2021-11-20 23:02:48,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:02:48,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 163 [2021-11-20 23:02:48,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 23:02:49,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:49,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:49,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,430 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:02:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 284 treesize of output 499 [2021-11-20 23:02:49,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,716 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:02:49,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 168 treesize of output 101 [2021-11-20 23:02:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,765 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:49,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 293 treesize of output 183 [2021-11-20 23:02:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:49,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:49,974 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 230 treesize of output 140 [2021-11-20 23:02:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:50,314 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:02:50,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 461 treesize of output 357 [2021-11-20 23:02:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:50,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:50,522 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 80 [2021-11-20 23:02:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:50,685 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:02:50,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:02:50,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:50,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:50,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:50,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,132 INFO L354 Elim1Store]: treesize reduction 222, result has 12.3 percent of original size [2021-11-20 23:02:51,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 287 treesize of output 502 [2021-11-20 23:02:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,525 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:51,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 96 [2021-11-20 23:02:51,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:51,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:51,646 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 172 [2021-11-20 23:02:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:52,403 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:02:52,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 611 treesize of output 437 [2021-11-20 23:02:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:52,747 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 23:02:52,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 124 [2021-11-20 23:02:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:53,118 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-11-20 23:02:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 351 treesize of output 211 [2021-11-20 23:02:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:53,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:53,446 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:02:53,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-20 23:02:53,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:53,860 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:02:54,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:02:54,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:02:54,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 23:02:54,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453572809] [2021-11-20 23:02:54,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:02:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:02:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:02:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:02:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:02:54,135 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:02:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:02:54,910 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-20 23:02:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:02:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 23:02:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:02:54,913 INFO L225 Difference]: With dead ends: 98 [2021-11-20 23:02:54,913 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 23:02:54,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:02:54,915 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:02:54,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 59 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:02:54,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 23:02:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-11-20 23:02:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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) [2021-11-20 23:02:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-20 23:02:54,928 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 18 [2021-11-20 23:02:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:02:54,928 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-20 23:02:54,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:02:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-20 23:02:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:02:54,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:02:54,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:02:54,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:02:55,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:02:55,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:02:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:02:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1375916955, now seen corresponding path program 6 times [2021-11-20 23:02:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:02:55,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872944953] [2021-11-20 23:02:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:02:55,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:02:55,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:02:55,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863987370] [2021-11-20 23:02:55,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:02:55,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:02:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:02:55,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:02:55,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9fda2bd-4cec-4993-9e0d-87febff94ec5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:02:56,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:02:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:02:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 23:02:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:02:57,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:02:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:02:57,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 23:02:57,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,199 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-20 23:02:57,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 258 treesize of output 480 [2021-11-20 23:02:57,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:02:57,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,830 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:02:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 182 [2021-11-20 23:02:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:57,994 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:02:57,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 219 treesize of output 132 [2021-11-20 23:02:58,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:58,081 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-20 23:02:58,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 239 treesize of output 112 [2021-11-20 23:02:58,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:58,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:02:58,204 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:02:58,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 69 [2021-11-20 23:03:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:03:00,527 INFO L328 TraceCheckSpWp]: Computing backward predicates...