./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:07:03,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:07:03,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:07:03,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:07:03,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:07:03,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:07:03,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:07:03,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:07:03,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:07:03,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:07:03,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:07:03,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:07:03,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:07:03,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:07:03,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:07:03,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:07:03,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:07:03,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:07:03,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:07:03,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:07:03,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:07:03,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:07:03,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:07:03,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:07:03,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:07:03,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:07:03,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:07:03,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:07:03,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:07:03,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:07:03,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:07:03,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:07:03,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:07:03,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:07:03,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:07:03,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:07:03,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:07:03,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:07:03,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:07:03,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:07:03,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:07:03,439 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:07:03,468 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:07:03,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:07:03,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:07:03,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:07:03,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:07:03,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:07:03,471 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:07:03,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:07:03,472 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:07:03,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:07:03,473 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:07:03,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:07:03,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:07:03,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:07:03,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:07:03,475 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:07:03,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:07:03,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:07:03,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:07:03,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:07:03,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:07:03,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:07:03,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:07:03,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:07:03,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:07:03,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:07:03,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:07:03,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:07:03,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:07:03,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:07:03,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:07:03,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:07:03,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:07:03,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:07:03,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:07:03,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:07:03,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:07:03,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:07:03,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:07:03,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:07:03,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:07:03,483 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_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-11-23 03:07:03,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:07:03,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:07:03,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:07:03,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:07:03,829 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:07:03,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 03:07:03,921 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/data/355b93f86/9c3cfc2128b542dcbafa009567942fe2/FLAG9dd127986 [2021-11-23 03:07:04,416 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:07:04,417 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 03:07:04,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/data/355b93f86/9c3cfc2128b542dcbafa009567942fe2/FLAG9dd127986 [2021-11-23 03:07:04,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/data/355b93f86/9c3cfc2128b542dcbafa009567942fe2 [2021-11-23 03:07:04,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:07:04,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:07:04,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:07:04,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:07:04,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:07:04,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:04" (1/1) ... [2021-11-23 03:07:04,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afbbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:04, skipping insertion in model container [2021-11-23 03:07:04,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:04" (1/1) ... [2021-11-23 03:07:04,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:07:04,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:07:05,050 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_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 03:07:05,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:07:05,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:07:05,143 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_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 03:07:05,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:07:05,203 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:07:05,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05 WrapperNode [2021-11-23 03:07:05,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:07:05,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:07:05,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:07:05,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:07:05,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,282 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2021-11-23 03:07:05,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:07:05,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:07:05,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:07:05,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:07:05,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:07:05,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:07:05,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:07:05,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:07:05,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (1/1) ... [2021-11-23 03:07:05,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:07:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:05,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:07:05,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:07:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:07:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:07:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:07:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:07:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:07:05,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:07:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:07:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:07:05,548 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:07:05,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:07:05,839 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:07:05,923 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:07:05,923 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-23 03:07:05,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:05 BoogieIcfgContainer [2021-11-23 03:07:05,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:07:05,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:07:05,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:07:05,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:07:05,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:07:04" (1/3) ... [2021-11-23 03:07:05,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268f2008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:05, skipping insertion in model container [2021-11-23 03:07:05,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:05" (2/3) ... [2021-11-23 03:07:05,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268f2008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:05, skipping insertion in model container [2021-11-23 03:07:05,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:05" (3/3) ... [2021-11-23 03:07:05,937 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-11-23 03:07:05,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:07:05,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:07:06,002 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:07:06,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:07:06,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:07:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:07:06,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:06,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:06,041 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2021-11-23 03:07:06,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213427486] [2021-11-23 03:07:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:06,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:06,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293599898] [2021-11-23 03:07:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:06,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:06,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:06,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:07:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:07:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:06,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:06,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213427486] [2021-11-23 03:07:06,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293599898] [2021-11-23 03:07:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293599898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:06,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:06,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:07:06,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658629888] [2021-11-23 03:07:06,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:06,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:07:06,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:07:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:07:06,570 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:06,714 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2021-11-23 03:07:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:07:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:07:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:06,731 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:07:06,732 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:07:06,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:07:06,744 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:06,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:07:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 03:07:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2021-11-23 03:07:06,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2021-11-23 03:07:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:06,816 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2021-11-23 03:07:06,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2021-11-23 03:07:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:07:06,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:06,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:06,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:07,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:07,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2021-11-23 03:07:07,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:07,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050575796] [2021-11-23 03:07:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:07,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:07,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085572737] [2021-11-23 03:07:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:07,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:07,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:07,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:07:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:07,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:07:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:07,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:07,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050575796] [2021-11-23 03:07:07,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085572737] [2021-11-23 03:07:07,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085572737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:07,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:07,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:07:07,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539060906] [2021-11-23 03:07:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:07,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:07,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:07,271 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:07,414 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-11-23 03:07:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:07:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:07:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:07,418 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:07:07,418 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:07:07,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:07,423 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:07,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:07:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-11-23 03:07:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2021-11-23 03:07:07,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2021-11-23 03:07:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:07,451 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2021-11-23 03:07:07,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2021-11-23 03:07:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:07:07,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:07,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:07,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:07,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:07,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2021-11-23 03:07:07,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:07,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994391947] [2021-11-23 03:07:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:07,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:07,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138719347] [2021-11-23 03:07:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:07,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:07,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:07,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:07:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:07:07,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:07,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:07,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994391947] [2021-11-23 03:07:07,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138719347] [2021-11-23 03:07:07,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138719347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:07,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:07,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:07:07,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287189165] [2021-11-23 03:07:07,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:07,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:07,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:07,824 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:07,948 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2021-11-23 03:07:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:07:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:07:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:07,953 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:07:07,954 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:07:07,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:07,959 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:07,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:07:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-23 03:07:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-23 03:07:07,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2021-11-23 03:07:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:07,982 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-23 03:07:07,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-23 03:07:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:07:07,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:07,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:08,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:08,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:08,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2021-11-23 03:07:08,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:08,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61606416] [2021-11-23 03:07:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:08,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:08,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950397305] [2021-11-23 03:07:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:08,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:08,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:08,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:07:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:08,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:08,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61606416] [2021-11-23 03:07:08,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950397305] [2021-11-23 03:07:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950397305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:08,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259754529] [2021-11-23 03:07:08,441 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:07:08,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:08,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:08,453 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:08,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:08,647 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:07:08,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:07:08,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:08,826 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:08,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:09,187 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 47 treesize of output 49 [2021-11-23 03:07:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:10,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:10,207 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:07:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:07:10,586 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 37 treesize of output 33 [2021-11-23 03:07:10,894 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 37 treesize of output 33 [2021-11-23 03:07:11,068 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 37 treesize of output 33 [2021-11-23 03:07:11,376 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:12,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1259754529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:12,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:12,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2021-11-23 03:07:12,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661183171] [2021-11-23 03:07:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:12,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:07:12,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:07:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:07:12,006 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:12,390 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2021-11-23 03:07:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:07:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:12,391 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:07:12,392 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:07:12,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:07:12,394 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:12,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:07:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-11-23 03:07:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2021-11-23 03:07:12,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2021-11-23 03:07:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:12,417 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2021-11-23 03:07:12,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2021-11-23 03:07:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:07:12,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:12,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:12,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:12,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:12,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2021-11-23 03:07:12,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:12,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123119648] [2021-11-23 03:07:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:12,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:12,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749044571] [2021-11-23 03:07:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:12,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:12,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:12,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:07:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:07:12,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:07:12,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123119648] [2021-11-23 03:07:12,830 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749044571] [2021-11-23 03:07:12,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749044571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818084528] [2021-11-23 03:07:12,837 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-23 03:07:12,837 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:12,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:12,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:12,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:12,936 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:07:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:07:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:13,032 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:13,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:13,160 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 51 treesize of output 53 [2021-11-23 03:07:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:13,552 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:07:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:07:13,734 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 37 treesize of output 33 [2021-11-23 03:07:13,836 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 37 treesize of output 33 [2021-11-23 03:07:14,062 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 37 treesize of output 33 [2021-11-23 03:07:14,140 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 37 treesize of output 33 [2021-11-23 03:07:14,198 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 37 treesize of output 33 [2021-11-23 03:07:14,384 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 37 treesize of output 33 [2021-11-23 03:07:14,470 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 37 treesize of output 33 [2021-11-23 03:07:14,543 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 37 treesize of output 33 [2021-11-23 03:07:14,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:14,693 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:14,775 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:14,848 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:14,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:14,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:14,979 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:14,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:15,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,066 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:15,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,243 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:15,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,398 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:15,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2021-11-23 03:07:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,496 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:15,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,576 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:15,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:15,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:15,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,671 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:15,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,733 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:15,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:15,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:15,948 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:16,079 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:16,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:07:16,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:16,174 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:16,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:16,184 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:16,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [818084528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:16,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:16,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2021-11-23 03:07:16,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753044410] [2021-11-23 03:07:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:16,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:07:16,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:07:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:07:16,919 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:17,988 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2021-11-23 03:07:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:07:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 03:07:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:17,991 INFO L225 Difference]: With dead ends: 57 [2021-11-23 03:07:17,991 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:07:17,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:07:17,993 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:17,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:07:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:07:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-11-23 03:07:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2021-11-23 03:07:18,016 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2021-11-23 03:07:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:18,016 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2021-11-23 03:07:18,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2021-11-23 03:07:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:07:18,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:18,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:18,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:18,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:18,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2021-11-23 03:07:18,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:18,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41620132] [2021-11-23 03:07:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:18,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:18,269 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:18,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128794015] [2021-11-23 03:07:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:18,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:18,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:18,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:07:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:18,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:07:18,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:07:18,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41620132] [2021-11-23 03:07:18,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128794015] [2021-11-23 03:07:18,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128794015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457196240] [2021-11-23 03:07:18,472 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:18,473 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:18,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:18,473 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:18,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:18,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:18,568 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:18,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:07:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:18,729 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 51 treesize of output 53 [2021-11-23 03:07:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:19,114 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:07:19,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:07:19,266 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 37 treesize of output 33 [2021-11-23 03:07:19,365 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 37 treesize of output 33 [2021-11-23 03:07:19,541 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 33 treesize of output 29 [2021-11-23 03:07:19,692 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:19,797 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 37 treesize of output 33 [2021-11-23 03:07:19,862 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 37 treesize of output 33 [2021-11-23 03:07:20,022 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 33 treesize of output 29 [2021-11-23 03:07:20,169 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:20,336 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 37 treesize of output 33 [2021-11-23 03:07:20,426 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 37 treesize of output 33 [2021-11-23 03:07:20,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:20,563 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:20,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:20,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:20,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:20,688 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2021-11-23 03:07:20,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:20,810 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:20,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:20,937 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:20,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:20,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,013 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:21,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:21,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,161 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:21,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:21,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,225 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:07:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,287 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:21,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:21,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,369 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:21,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,505 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:07:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,603 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:21,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,917 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:21,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:21,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:22,049 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:07:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:22,134 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:22,145 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1457196240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:23,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:23,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2021-11-23 03:07:23,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124225831] [2021-11-23 03:07:23,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:23,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:07:23,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:07:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:07:23,099 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:23,971 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2021-11-23 03:07:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:07:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 03:07:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:23,972 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:07:23,973 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:07:23,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:07:23,974 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:23,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:07:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-11-23 03:07:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-11-23 03:07:23,989 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2021-11-23 03:07:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:23,990 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-11-23 03:07:23,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-11-23 03:07:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:07:23,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:23,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:24,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:07:24,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:07:24,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:24,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2021-11-23 03:07:24,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:24,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015430435] [2021-11-23 03:07:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:24,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:24,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:24,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723554069] [2021-11-23 03:07:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:24,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:24,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:24,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:24,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:07:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:24,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:07:24,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:07:24,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015430435] [2021-11-23 03:07:24,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723554069] [2021-11-23 03:07:24,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723554069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325384320] [2021-11-23 03:07:24,425 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:24,426 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:24,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:24,426 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:24,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,521 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:07:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,658 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 47 treesize of output 49 [2021-11-23 03:07:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:25,029 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:07:25,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:07:25,201 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 37 treesize of output 33 [2021-11-23 03:07:25,282 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 37 treesize of output 33 [2021-11-23 03:07:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 03:07:25,569 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:25,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:25,664 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 37 treesize of output 33 [2021-11-23 03:07:25,725 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 37 treesize of output 33 [2021-11-23 03:07:25,869 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 33 treesize of output 29 [2021-11-23 03:07:26,006 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:26,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:26,151 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 37 treesize of output 33 [2021-11-23 03:07:26,260 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 37 treesize of output 33 [2021-11-23 03:07:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,394 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:26,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,471 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:26,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,526 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,631 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:26,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,670 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:26,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,798 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:26,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:26,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,877 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:07:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:26,929 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:26,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:26,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,006 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,074 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:27,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,131 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,347 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:27,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,516 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-23 03:07:27,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,601 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,666 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,791 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:27,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,854 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:27,916 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:27,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,024 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:28,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,103 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:28,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:28,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,174 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:28,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:28,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,281 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,363 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:28,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:28,420 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:28,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:28,426 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:29,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:07:29,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:29,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:29,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:07:29,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224607369] [2021-11-23 03:07:29,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:29,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:07:29,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:07:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:07:29,797 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:30,009 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2021-11-23 03:07:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:07:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 03:07:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:30,012 INFO L225 Difference]: With dead ends: 95 [2021-11-23 03:07:30,012 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 03:07:30,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:07:30,013 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:30,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 14 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 03:07:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-11-23 03:07:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-11-23 03:07:30,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2021-11-23 03:07:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:30,034 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-11-23 03:07:30,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-11-23 03:07:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:07:30,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:30,035 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:30,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:30,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:30,257 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2021-11-23 03:07:30,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:30,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526066791] [2021-11-23 03:07:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:30,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:30,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697372177] [2021-11-23 03:07:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:07:30,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:30,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:30,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:07:30,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:07:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:07:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:07:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 03:07:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 03:07:30,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526066791] [2021-11-23 03:07:30,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697372177] [2021-11-23 03:07:30,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697372177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612044647] [2021-11-23 03:07:30,589 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:30,589 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:30,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:30,590 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:30,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:30,716 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:07:30,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:07:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:30,818 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:30,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:30,932 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 51 treesize of output 53 [2021-11-23 03:07:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:31,273 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:07:31,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:07:31,405 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 37 treesize of output 33 [2021-11-23 03:07:31,492 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 37 treesize of output 33 [2021-11-23 03:07:31,689 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 37 treesize of output 33 [2021-11-23 03:07:31,749 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 37 treesize of output 33 [2021-11-23 03:07:31,795 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 37 treesize of output 33 [2021-11-23 03:07:31,954 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 33 treesize of output 29 [2021-11-23 03:07:32,019 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 37 treesize of output 33 [2021-11-23 03:07:32,079 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 37 treesize of output 33 [2021-11-23 03:07:32,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,204 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,280 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,340 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,430 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,483 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,607 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,687 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:07:32,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,740 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,797 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,868 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:32,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:32,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:32,912 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,074 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,175 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-23 03:07:33,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,250 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,319 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,441 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,572 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:07:33,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,639 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,687 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,793 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,859 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:33,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:33,925 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:33,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:34,037 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:34,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:34,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:34,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:34,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:34,109 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:34,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:34,166 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:34,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:35,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:07:35,423 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:35,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:35,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:07:35,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54276868] [2021-11-23 03:07:35,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:35,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:07:35,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:07:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:07:35,425 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:35,617 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2021-11-23 03:07:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:07:35,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:07:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:35,620 INFO L225 Difference]: With dead ends: 162 [2021-11-23 03:07:35,621 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 03:07:35,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:07:35,623 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 136 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:35,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 16 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 03:07:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2021-11-23 03:07:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-23 03:07:35,657 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2021-11-23 03:07:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:35,658 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-23 03:07:35,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-23 03:07:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 03:07:35,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:35,661 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:35,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:35,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:35,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2021-11-23 03:07:35,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:35,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775270848] [2021-11-23 03:07:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:35,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:35,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:35,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225873332] [2021-11-23 03:07:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:07:35,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:35,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:35,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:07:35,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:07:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:07:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:07:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 03:07:36,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 03:07:36,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775270848] [2021-11-23 03:07:36,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225873332] [2021-11-23 03:07:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225873332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196360668] [2021-11-23 03:07:36,303 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:36,303 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:36,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:36,304 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:36,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,397 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:36,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:07:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,519 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 47 treesize of output 49 [2021-11-23 03:07:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:36,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:36,844 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:07:36,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:07:36,993 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 37 treesize of output 33 [2021-11-23 03:07:37,061 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 37 treesize of output 33 [2021-11-23 03:07:37,174 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 33 treesize of output 29 [2021-11-23 03:07:37,285 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:37,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:37,430 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 37 treesize of output 33 [2021-11-23 03:07:37,495 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 37 treesize of output 33 [2021-11-23 03:07:37,611 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 33 treesize of output 29 [2021-11-23 03:07:37,730 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:07:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:07:37,834 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 37 treesize of output 33 [2021-11-23 03:07:37,886 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 37 treesize of output 33 [2021-11-23 03:07:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,007 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,062 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:38,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,125 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,217 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,290 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:38,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,407 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:38,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,540 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:38,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2021-11-23 03:07:38,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,610 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:38,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,689 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:38,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,806 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:38,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:07:38,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:38,892 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:38,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,059 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:39,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,107 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,172 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,297 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,352 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,405 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,490 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,602 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:39,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:07:39,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,698 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,764 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:39,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,847 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,007 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:40,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:07:40,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:40,101 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:40,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:40,111 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:41,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:07:41,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:41,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 03:07:41,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182213144] [2021-11-23 03:07:41,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:07:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:07:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:07:41,872 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:42,251 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2021-11-23 03:07:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:07:42,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 03:07:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:42,253 INFO L225 Difference]: With dead ends: 260 [2021-11-23 03:07:42,253 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 03:07:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 146 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:07:42,256 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:42,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 51 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 03:07:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2021-11-23 03:07:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2021-11-23 03:07:42,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2021-11-23 03:07:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:42,295 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2021-11-23 03:07:42,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2021-11-23 03:07:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 03:07:42,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:42,298 INFO L514 BasicCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:42,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:42,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:07:42,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:42,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2021-11-23 03:07:42,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:42,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491783751] [2021-11-23 03:07:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:42,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:42,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916866180] [2021-11-23 03:07:42,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:07:42,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:42,522 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:42,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:07:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:07:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-23 03:07:42,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-23 03:07:42,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491783751] [2021-11-23 03:07:42,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916866180] [2021-11-23 03:07:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916866180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144434791] [2021-11-23 03:07:42,994 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:42,994 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:42,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:42,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:42,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,114 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:07:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,228 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 47 treesize of output 49 [2021-11-23 03:07:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:43,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:43,529 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:07:43,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:07:43,768 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 37 treesize of output 33 [2021-11-23 03:07:43,842 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 37 treesize of output 33 [2021-11-23 03:07:43,990 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 37 treesize of output 33 [2021-11-23 03:07:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:44,105 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 150 treesize of output 128 [2021-11-23 03:07:44,178 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 37 treesize of output 33 [2021-11-23 03:07:44,231 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 37 treesize of output 33 [2021-11-23 03:07:44,391 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 37 treesize of output 33 [2021-11-23 03:07:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:44,506 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 150 treesize of output 128 [2021-11-23 03:07:44,586 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 37 treesize of output 33 [2021-11-23 03:07:44,635 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 37 treesize of output 33 [2021-11-23 03:07:44,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,732 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:44,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:44,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,790 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,830 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:44,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,942 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:44,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:44,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:44,999 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,111 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:45,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,232 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2021-11-23 03:07:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,298 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:45,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:45,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,385 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:45,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:45,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,470 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:45,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:45,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,532 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:45,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:45,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,705 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:45,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,902 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-23 03:07:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2021-11-23 03:07:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:45,995 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:45,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,057 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:46,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,157 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:46,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:46,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,315 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:07:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:07:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,410 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:46,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,473 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:46,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,572 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:46,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:46,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,764 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:07:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:07:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,855 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,903 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:46,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:46,971 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:47,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:47,099 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:07:47,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:47,172 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:47,179 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:48,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3947#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:07:48,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:48,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:48,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 03:07:48,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204062306] [2021-11-23 03:07:48,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:48,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:07:48,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:07:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:07:48,560 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:48,995 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2021-11-23 03:07:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:07:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 03:07:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:48,998 INFO L225 Difference]: With dead ends: 327 [2021-11-23 03:07:48,998 INFO L226 Difference]: Without dead ends: 235 [2021-11-23 03:07:48,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:07:49,000 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:49,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:07:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-23 03:07:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2021-11-23 03:07:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2021-11-23 03:07:49,083 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2021-11-23 03:07:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:49,083 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2021-11-23 03:07:49,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2021-11-23 03:07:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:07:49,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:49,088 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:49,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:07:49,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2021-11-23 03:07:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936850724] [2021-11-23 03:07:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:49,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:49,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:49,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168645707] [2021-11-23 03:07:49,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:07:49,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:49,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:07:49,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:07:49,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:07:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-23 03:07:49,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-23 03:07:49,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936850724] [2021-11-23 03:07:49,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168645707] [2021-11-23 03:07:49,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168645707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309473400] [2021-11-23 03:07:49,995 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:49,995 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:49,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:49,996 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:49,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,082 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:50,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:07:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,170 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 51 treesize of output 53 [2021-11-23 03:07:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,391 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:07:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:07:50,484 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 37 treesize of output 33 [2021-11-23 03:07:50,541 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 37 treesize of output 33 [2021-11-23 03:07:50,659 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 37 treesize of output 33 [2021-11-23 03:07:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:50,754 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 150 treesize of output 128 [2021-11-23 03:07:50,832 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 37 treesize of output 33 [2021-11-23 03:07:50,870 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 37 treesize of output 33 [2021-11-23 03:07:51,000 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 37 treesize of output 33 [2021-11-23 03:07:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,088 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 150 treesize of output 128 [2021-11-23 03:07:51,140 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 37 treesize of output 33 [2021-11-23 03:07:51,180 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 37 treesize of output 33 [2021-11-23 03:07:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,290 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,349 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:51,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:51,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,411 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,532 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,580 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,684 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,741 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:07:51,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,786 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,842 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:51,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,913 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:51,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:07:51,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:51,958 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,103 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,222 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-23 03:07:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,287 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,346 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,433 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,480 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,538 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,627 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,689 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,738 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,812 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:52,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:52,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,923 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:07:52,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:07:52,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:52,976 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:52,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:52,984 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:07:54,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5716#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:07:54,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:07:54,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:07:54,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:07:54,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319174607] [2021-11-23 03:07:54,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:07:54,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:07:54,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:07:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:07:54,345 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:54,594 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2021-11-23 03:07:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:07:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 03:07:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:54,598 INFO L225 Difference]: With dead ends: 398 [2021-11-23 03:07:54,598 INFO L226 Difference]: Without dead ends: 344 [2021-11-23 03:07:54,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:07:54,600 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 246 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:54,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:07:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-23 03:07:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2021-11-23 03:07:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2021-11-23 03:07:54,659 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2021-11-23 03:07:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2021-11-23 03:07:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2021-11-23 03:07:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 03:07:54,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:54,664 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:54,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:54,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:54,889 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2021-11-23 03:07:54,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:54,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63104855] [2021-11-23 03:07:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:54,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:54,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:07:54,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398389896] [2021-11-23 03:07:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:07:54,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:54,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:54,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:07:54,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:07:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:07:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:07:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-23 03:07:55,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:07:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-23 03:07:55,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63104855] [2021-11-23 03:07:55,366 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:07:55,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398389896] [2021-11-23 03:07:55,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398389896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:07:55,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444283448] [2021-11-23 03:07:55,368 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:07:55,369 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:07:55,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:07:55,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:07:55,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:07:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,436 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:07:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:07:55,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,538 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:07:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:07:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,653 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 47 treesize of output 49 [2021-11-23 03:07:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:55,914 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:07:55,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:07:56,160 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 37 treesize of output 33 [2021-11-23 03:07:56,224 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 37 treesize of output 33 [2021-11-23 03:07:56,369 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 33 treesize of output 29 [2021-11-23 03:07:56,413 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 37 treesize of output 33 [2021-11-23 03:07:56,465 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 37 treesize of output 33 [2021-11-23 03:07:56,587 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 33 treesize of output 29 [2021-11-23 03:07:56,659 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 37 treesize of output 33 [2021-11-23 03:07:56,722 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 37 treesize of output 33 [2021-11-23 03:07:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:56,851 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:56,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:56,922 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:07:56,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:56,967 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:56,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,070 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,109 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,211 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:07:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,274 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:07:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:07:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,318 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,370 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:57,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,481 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:07:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,564 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,710 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,751 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,800 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:57,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,896 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:57,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,089 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:07:58,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:07:58,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,178 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:58,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:58,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,231 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:58,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:58,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,323 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:07:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:07:58,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,511 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:07:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:07:58,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,596 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:58,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,645 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:58,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,717 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:07:58,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:07:58,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,815 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:07:58,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:07:58,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:07:58,885 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:07:58,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:07:58,889 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:00,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7636#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:00,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:00,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:00,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-23 03:08:00,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278413593] [2021-11-23 03:08:00,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:00,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:08:00,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:08:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:08:00,131 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:00,335 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2021-11-23 03:08:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:08:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-23 03:08:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:00,339 INFO L225 Difference]: With dead ends: 293 [2021-11-23 03:08:00,339 INFO L226 Difference]: Without dead ends: 234 [2021-11-23 03:08:00,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 402 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:08:00,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:08:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-23 03:08:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2021-11-23 03:08:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2021-11-23 03:08:00,394 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2021-11-23 03:08:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:00,395 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2021-11-23 03:08:00,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2021-11-23 03:08:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 03:08:00,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:00,399 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:00,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:00,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:00,605 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2021-11-23 03:08:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124481261] [2021-11-23 03:08:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:00,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:00,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:00,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144476700] [2021-11-23 03:08:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:08:00,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:00,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:00,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:00,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:08:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:08:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-23 03:08:01,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-23 03:08:01,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124481261] [2021-11-23 03:08:01,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144476700] [2021-11-23 03:08:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144476700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:01,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18427470] [2021-11-23 03:08:01,561 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:08:01,561 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:01,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:01,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:01,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:01,644 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:08:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:08:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:01,727 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:08:01,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:08:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:01,799 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 51 treesize of output 53 [2021-11-23 03:08:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:02,092 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:08:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:08:02,234 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 37 treesize of output 33 [2021-11-23 03:08:02,317 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 37 treesize of output 33 [2021-11-23 03:08:02,461 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 37 treesize of output 33 [2021-11-23 03:08:02,510 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 37 treesize of output 33 [2021-11-23 03:08:02,547 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 37 treesize of output 33 [2021-11-23 03:08:02,665 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 33 treesize of output 29 [2021-11-23 03:08:02,713 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 37 treesize of output 33 [2021-11-23 03:08:02,753 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 37 treesize of output 33 [2021-11-23 03:08:02,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,846 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:02,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:02,960 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:02,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2021-11-23 03:08:03,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,045 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,155 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,213 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,308 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,368 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:03,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:08:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,413 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,468 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,527 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:03,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:08:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,570 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,711 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,758 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,806 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,908 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:03,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,950 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:03,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:03,998 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:03,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:04,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,080 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:04,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,187 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:04,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:08:04,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,243 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:04,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:04,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,286 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,378 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:04,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,511 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:08:04,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:08:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:04,578 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:04,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:04,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:05,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9429#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:05,873 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:05,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:05,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-23 03:08:05,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185077578] [2021-11-23 03:08:05,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:05,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:08:05,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:08:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 03:08:05,876 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:07,247 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2021-11-23 03:08:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 03:08:07,248 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 03:08:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:07,254 INFO L225 Difference]: With dead ends: 831 [2021-11-23 03:08:07,254 INFO L226 Difference]: Without dead ends: 664 [2021-11-23 03:08:07,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 386 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=756, Invalid=1406, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 03:08:07,260 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 906 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:07,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 68 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:08:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-23 03:08:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2021-11-23 03:08:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2021-11-23 03:08:07,390 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2021-11-23 03:08:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:07,390 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2021-11-23 03:08:07,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2021-11-23 03:08:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-23 03:08:07,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:07,395 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:07,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:07,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:08:07,621 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2021-11-23 03:08:07,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944931118] [2021-11-23 03:08:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:07,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:07,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561354493] [2021-11-23 03:08:07,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:08:07,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:07,638 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:07,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:08:07,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:08:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:08:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2021-11-23 03:08:08,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:08,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944931118] [2021-11-23 03:08:08,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561354493] [2021-11-23 03:08:08,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561354493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:08,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:08,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:08:08,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761790604] [2021-11-23 03:08:08,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:08,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:08:08,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:08:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:08,241 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:08,413 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2021-11-23 03:08:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:08:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-23 03:08:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:08,417 INFO L225 Difference]: With dead ends: 493 [2021-11-23 03:08:08,417 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 03:08:08,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:08,419 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:08,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 11 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:08:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 03:08:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2021-11-23 03:08:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2021-11-23 03:08:08,517 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2021-11-23 03:08:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:08,518 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2021-11-23 03:08:08,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2021-11-23 03:08:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-23 03:08:08,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:08,522 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:08,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:08,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:08:08,745 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2021-11-23 03:08:08,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:08,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375158431] [2021-11-23 03:08:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:08,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:08,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300510731] [2021-11-23 03:08:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:08:08,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:08,764 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:08,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:08:08,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:08:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:08:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-23 03:08:09,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-23 03:08:09,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375158431] [2021-11-23 03:08:09,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300510731] [2021-11-23 03:08:09,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300510731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491212963] [2021-11-23 03:08:09,660 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:08:09,660 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:09,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:09,661 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:09,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:09,742 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:08:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:08:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:08:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:09,839 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 51 treesize of output 53 [2021-11-23 03:08:10,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:10,096 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:08:10,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:08:10,199 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 37 treesize of output 33 [2021-11-23 03:08:10,254 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 37 treesize of output 33 [2021-11-23 03:08:10,365 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 33 treesize of output 29 [2021-11-23 03:08:10,505 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:08:10,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:08:10,618 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 37 treesize of output 33 [2021-11-23 03:08:10,680 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 37 treesize of output 33 [2021-11-23 03:08:10,801 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 33 treesize of output 29 [2021-11-23 03:08:10,901 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:08:10,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:08:11,018 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 37 treesize of output 33 [2021-11-23 03:08:11,073 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 37 treesize of output 33 [2021-11-23 03:08:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,186 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,270 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:11,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:08:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,315 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,407 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:11,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,452 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,556 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,615 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:08:11,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,664 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,738 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:11,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,797 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:11,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:08:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,837 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:11,971 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:12,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,019 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,064 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,159 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:12,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,218 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,263 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,346 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,393 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,441 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,517 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:12,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,573 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:12,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:08:12,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:12,618 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:12,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:12,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:17,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15358#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:17,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:17,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:17,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-23 03:08:17,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260288718] [2021-11-23 03:08:17,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:17,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:08:17,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:17,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:08:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:08:17,190 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:17,579 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2021-11-23 03:08:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:08:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-23 03:08:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:17,584 INFO L225 Difference]: With dead ends: 493 [2021-11-23 03:08:17,584 INFO L226 Difference]: Without dead ends: 358 [2021-11-23 03:08:17,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 528 SyntacticMatches, 186 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:08:17,586 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:17,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:08:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-23 03:08:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2021-11-23 03:08:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2021-11-23 03:08:17,685 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2021-11-23 03:08:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2021-11-23 03:08:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2021-11-23 03:08:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 03:08:17,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:17,691 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:17,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:17,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2021-11-23 03:08:17,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:17,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001557510] [2021-11-23 03:08:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:17,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:17,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:17,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830072345] [2021-11-23 03:08:17,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:08:17,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:17,925 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:17,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:08:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:08:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-23 03:08:18,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-23 03:08:20,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001557510] [2021-11-23 03:08:20,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830072345] [2021-11-23 03:08:20,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830072345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2027907749] [2021-11-23 03:08:20,198 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:08:20,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:20,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:20,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:20,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,305 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:08:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:08:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:08:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,427 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 47 treesize of output 49 [2021-11-23 03:08:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:20,677 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:08:20,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:08:20,848 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 37 treesize of output 33 [2021-11-23 03:08:20,909 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 37 treesize of output 33 [2021-11-23 03:08:21,012 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 37 treesize of output 33 [2021-11-23 03:08:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:21,101 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 150 treesize of output 128 [2021-11-23 03:08:21,154 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 37 treesize of output 33 [2021-11-23 03:08:21,188 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 37 treesize of output 33 [2021-11-23 03:08:21,299 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 37 treesize of output 33 [2021-11-23 03:08:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:21,381 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 150 treesize of output 128 [2021-11-23 03:08:21,458 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 37 treesize of output 33 [2021-11-23 03:08:21,501 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 37 treesize of output 33 [2021-11-23 03:08:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,603 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:21,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,673 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:21,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:08:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,722 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,818 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:21,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,855 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:21,954 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:21,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:22,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:22,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,047 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:22,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:08:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,096 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,155 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:22,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,263 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:08:22,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,333 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,496 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:22,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,684 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:08:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2021-11-23 03:08:22,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,773 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,823 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,900 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,939 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:22,982 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:22,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:23,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,088 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,246 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:08:23,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:08:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,351 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:23,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,419 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:23,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,511 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:23,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:23,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,670 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:08:23,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:23,737 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:23,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:23,744 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:25,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18488#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:25,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:25,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:25,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-23 03:08:25,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861140930] [2021-11-23 03:08:25,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:25,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 03:08:25,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 03:08:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=2266, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 03:08:25,395 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:29,703 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2021-11-23 03:08:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 03:08:29,704 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-23 03:08:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:29,715 INFO L225 Difference]: With dead ends: 1739 [2021-11-23 03:08:29,715 INFO L226 Difference]: Without dead ends: 1439 [2021-11-23 03:08:29,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 687 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2613, Invalid=4359, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 03:08:29,720 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1891 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:29,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1891 Valid, 140 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 03:08:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-23 03:08:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2021-11-23 03:08:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2021-11-23 03:08:29,990 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2021-11-23 03:08:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:29,990 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2021-11-23 03:08:29,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2021-11-23 03:08:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-23 03:08:29,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:29,993 INFO L514 BasicCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:30,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:30,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:08:30,194 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2021-11-23 03:08:30,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:30,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933762067] [2021-11-23 03:08:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:30,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:30,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506747969] [2021-11-23 03:08:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:08:30,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:30,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:30,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 03:08:30,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:08:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:08:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2021-11-23 03:08:31,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:31,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933762067] [2021-11-23 03:08:31,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506747969] [2021-11-23 03:08:31,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506747969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:31,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:31,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:08:31,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492707341] [2021-11-23 03:08:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:08:31,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:08:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:31,480 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:31,769 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2021-11-23 03:08:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:08:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-11-23 03:08:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:31,776 INFO L225 Difference]: With dead ends: 765 [2021-11-23 03:08:31,776 INFO L226 Difference]: Without dead ends: 594 [2021-11-23 03:08:31,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:31,786 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:31,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:08:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-23 03:08:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2021-11-23 03:08:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2021-11-23 03:08:31,993 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2021-11-23 03:08:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:31,994 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2021-11-23 03:08:31,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2021-11-23 03:08:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-23 03:08:31,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:31,997 INFO L514 BasicCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:32,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:32,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:08:32,197 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2021-11-23 03:08:32,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:32,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975923516] [2021-11-23 03:08:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:32,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:32,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145772457] [2021-11-23 03:08:32,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:08:32,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:32,220 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:32,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 03:08:32,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:08:32,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:08:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:08:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-23 03:08:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-23 03:08:33,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975923516] [2021-11-23 03:08:33,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145772457] [2021-11-23 03:08:33,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145772457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547034241] [2021-11-23 03:08:33,780 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:08:33,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:33,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:33,781 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:33,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:33,883 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:08:33,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:08:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:33,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:33,958 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:08:33,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:08:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:34,051 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 47 treesize of output 49 [2021-11-23 03:08:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:34,375 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:08:34,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:08:34,497 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 37 treesize of output 33 [2021-11-23 03:08:34,561 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 37 treesize of output 33 [2021-11-23 03:08:34,701 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 37 treesize of output 33 [2021-11-23 03:08:34,742 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 37 treesize of output 33 [2021-11-23 03:08:34,780 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 37 treesize of output 33 [2021-11-23 03:08:34,906 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 37 treesize of output 33 [2021-11-23 03:08:34,948 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 37 treesize of output 33 [2021-11-23 03:08:34,989 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 37 treesize of output 33 [2021-11-23 03:08:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,110 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,245 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:35,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2021-11-23 03:08:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,316 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,409 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:35,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,451 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:35,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,554 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,725 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:08:35,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2021-11-23 03:08:35,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,793 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:35,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,846 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:35,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:35,972 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:08:35,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:08:36,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,039 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,182 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,233 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,289 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,401 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:08:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:08:36,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,580 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:08:36,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:08:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,678 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,723 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,804 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,853 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,902 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:36,970 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:36,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:37,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:37,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:37,113 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:37,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:08:37,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:37,174 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:37,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:37,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:38,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29545#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:38,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:38,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:38,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-23 03:08:38,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182719043] [2021-11-23 03:08:38,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:08:38,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:08:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:08:38,505 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:38,983 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2021-11-23 03:08:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:08:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-11-23 03:08:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:38,989 INFO L225 Difference]: With dead ends: 1003 [2021-11-23 03:08:38,989 INFO L226 Difference]: Without dead ends: 812 [2021-11-23 03:08:38,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1299 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:08:38,991 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:38,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:08:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-23 03:08:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2021-11-23 03:08:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2021-11-23 03:08:39,178 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2021-11-23 03:08:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:39,179 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2021-11-23 03:08:39,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:08:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2021-11-23 03:08:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-23 03:08:39,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:39,182 INFO L514 BasicCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:39,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:39,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:39,383 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2021-11-23 03:08:39,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:39,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292719072] [2021-11-23 03:08:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:39,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:39,428 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736992534] [2021-11-23 03:08:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:08:39,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:39,433 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:39,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 03:08:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2565 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 03:08:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-23 03:08:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:08:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-23 03:08:47,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292719072] [2021-11-23 03:08:47,437 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736992534] [2021-11-23 03:08:47,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736992534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132123339] [2021-11-23 03:08:47,439 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:08:47,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:08:47,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:08:47,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:08:47,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:08:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,516 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:08:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:08:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,608 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:08:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:08:47,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,687 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 47 treesize of output 49 [2021-11-23 03:08:47,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:47,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:47,944 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:08:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:08:48,069 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 37 treesize of output 33 [2021-11-23 03:08:48,130 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 37 treesize of output 33 [2021-11-23 03:08:48,295 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 33 treesize of output 29 [2021-11-23 03:08:48,339 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 37 treesize of output 33 [2021-11-23 03:08:48,374 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 37 treesize of output 33 [2021-11-23 03:08:48,545 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 33 treesize of output 29 [2021-11-23 03:08:48,604 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 37 treesize of output 33 [2021-11-23 03:08:48,654 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 37 treesize of output 33 [2021-11-23 03:08:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:48,789 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:48,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:48,865 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:48,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:08:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:48,909 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:48,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:48,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,004 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:49,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,048 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,131 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,200 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:49,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:08:49,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,239 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,296 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:08:49,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:08:49,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,454 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:08:49,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2021-11-23 03:08:49,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,504 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,646 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:49,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,759 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:49,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-23 03:08:49,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,822 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,868 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:49,959 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:49,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,008 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,048 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,115 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,155 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,196 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,270 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:50,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,337 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:08:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:08:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:50,377 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:08:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:08:50,406 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:08:52,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35414#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:08:52,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:08:52,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:08:52,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-23 03:08:52,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138352942] [2021-11-23 03:08:52,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:52,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 03:08:52,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:52,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 03:08:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5009, Invalid=6547, Unknown=0, NotChecked=0, Total=11556 [2021-11-23 03:08:52,403 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:18,362 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2021-11-23 03:09:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-23 03:09:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2021-11-23 03:09:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:18,386 INFO L225 Difference]: With dead ends: 4184 [2021-11-23 03:09:18,386 INFO L226 Difference]: Without dead ends: 3627 [2021-11-23 03:09:18,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1244 SyntacticMatches, 13 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8577 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=9756, Invalid=14114, Unknown=0, NotChecked=0, Total=23870 [2021-11-23 03:09:18,397 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3614 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 2301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2301 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:18,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3614 Valid, 284 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2301 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 03:09:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-11-23 03:09:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2021-11-23 03:09:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2021-11-23 03:09:18,832 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2021-11-23 03:09:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:18,832 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2021-11-23 03:09:18,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2021-11-23 03:09:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-23 03:09:18,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:18,842 INFO L514 BasicCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:18,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:19,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:19,057 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2021-11-23 03:09:19,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999398714] [2021-11-23 03:09:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:19,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:19,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:19,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006308695] [2021-11-23 03:09:19,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:09:19,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:19,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:19,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 03:09:19,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:09:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:09:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-23 03:09:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-23 03:09:30,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999398714] [2021-11-23 03:09:30,764 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006308695] [2021-11-23 03:09:30,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006308695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378756914] [2021-11-23 03:09:30,767 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:09:30,767 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:30,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:30,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:30,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,848 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:09:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:09:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,932 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:09:31,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,014 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 47 treesize of output 49 [2021-11-23 03:09:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:31,247 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:09:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:09:31,482 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 37 treesize of output 33 [2021-11-23 03:09:31,558 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 37 treesize of output 33 [2021-11-23 03:09:31,698 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 33 treesize of output 29 [2021-11-23 03:09:31,740 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 37 treesize of output 33 [2021-11-23 03:09:31,817 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 37 treesize of output 33 [2021-11-23 03:09:31,927 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 37 treesize of output 33 [2021-11-23 03:09:31,979 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 37 treesize of output 33 [2021-11-23 03:09:32,016 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 37 treesize of output 33 [2021-11-23 03:09:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,123 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,194 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:32,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:09:32,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,238 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,335 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,393 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,495 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,559 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:09:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,606 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,664 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,723 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:09:32,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,765 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:32,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,893 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:09:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:09:32,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,045 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:09:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2021-11-23 03:09:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,125 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,173 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,262 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:33,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,436 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:33,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:09:33,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,493 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,540 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,626 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:09:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:09:33,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,819 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-23 03:09:33,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2021-11-23 03:09:33,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,925 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:33,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:33,991 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:33,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:34,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:34,092 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:34,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:34,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:34,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:34,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:34,179 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:34,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:09:34,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:34,235 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:34,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:34,242 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:35,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50762#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:09:35,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:35,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:35,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-23 03:09:35,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843438175] [2021-11-23 03:09:35,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:35,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:09:35,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:09:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:09:35,589 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:36,205 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2021-11-23 03:09:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:09:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 839 [2021-11-23 03:09:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:36,213 INFO L225 Difference]: With dead ends: 1449 [2021-11-23 03:09:36,213 INFO L226 Difference]: Without dead ends: 1139 [2021-11-23 03:09:36,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 2488 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:09:36,215 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:09:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-23 03:09:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2021-11-23 03:09:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2021-11-23 03:09:36,640 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2021-11-23 03:09:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:36,642 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2021-11-23 03:09:36,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2021-11-23 03:09:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2021-11-23 03:09:36,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:36,653 INFO L514 BasicCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:36,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:36,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 03:09:36,865 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2021-11-23 03:09:36,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:36,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010363371] [2021-11-23 03:09:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:36,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:36,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:36,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746249774] [2021-11-23 03:09:36,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:09:36,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:36,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:36,911 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:36,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:09:37,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:09:37,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:09:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-23 03:09:38,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-23 03:09:39,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:39,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010363371] [2021-11-23 03:09:39,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746249774] [2021-11-23 03:09:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746249774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362215135] [2021-11-23 03:09:39,600 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:09:39,601 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:39,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:39,601 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:39,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:39,690 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:39,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:09:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-23 03:09:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:39,804 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 47 treesize of output 49 [2021-11-23 03:09:40,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:40,118 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:09:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:09:40,357 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 37 treesize of output 33 [2021-11-23 03:09:40,420 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 37 treesize of output 33 [2021-11-23 03:09:40,529 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 33 treesize of output 29 [2021-11-23 03:09:40,629 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-23 03:09:40,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-23 03:09:40,743 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 37 treesize of output 33 [2021-11-23 03:09:40,807 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 37 treesize of output 33 [2021-11-23 03:09:40,909 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 37 treesize of output 33 [2021-11-23 03:09:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,995 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 150 treesize of output 128 [2021-11-23 03:09:41,049 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 37 treesize of output 33 [2021-11-23 03:09:41,129 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 37 treesize of output 33 [2021-11-23 03:09:41,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,220 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:09:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:09:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,314 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:09:41,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2021-11-23 03:09:41,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,403 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:41,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,505 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:09:41,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:09:41,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,550 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:41,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:41,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,643 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:09:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:09:41,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,824 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:09:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2021-11-23 03:09:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,893 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:41,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:41,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,953 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:09:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:09:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:41,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,120 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:09:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:09:42,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,203 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,371 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,421 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,467 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,552 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:09:42,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:09:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,600 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,647 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,731 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:09:42,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:09:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,772 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,817 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,883 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:42,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:42,940 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:09:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:09:42,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:43,007 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:09:43,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:09:43,016 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:44,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60727#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:09:44,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:44,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:44,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-23 03:09:44,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458370556] [2021-11-23 03:09:44,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:44,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:09:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:09:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:09:44,560 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:46,034 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2021-11-23 03:09:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:09:46,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 844 [2021-11-23 03:09:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:46,045 INFO L225 Difference]: With dead ends: 1567 [2021-11-23 03:09:46,045 INFO L226 Difference]: Without dead ends: 1198 [2021-11-23 03:09:46,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 2504 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 03:09:46,049 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:46,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:09:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-23 03:09:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2021-11-23 03:09:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2021-11-23 03:09:46,684 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2021-11-23 03:09:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:46,686 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2021-11-23 03:09:46,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2021-11-23 03:09:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-11-23 03:09:46,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:46,702 INFO L514 BasicCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:46,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:46,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:46,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2021-11-23 03:09:46,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:46,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519429460] [2021-11-23 03:09:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:46,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:46,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544067578] [2021-11-23 03:09:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:09:46,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:46,965 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:46,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 03:09:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 4905 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-23 03:09:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-23 03:09:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-23 03:11:34,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519429460] [2021-11-23 03:11:34,852 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544067578] [2021-11-23 03:11:34,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544067578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839111358] [2021-11-23 03:11:34,855 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:11:34,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:34,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:34,856 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:34,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:34,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:34,950 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:11:34,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:11:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:35,039 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:11:35,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:11:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:35,114 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 51 treesize of output 53 [2021-11-23 03:11:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:35,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:35,392 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:11:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:11:35,490 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 37 treesize of output 33 [2021-11-23 03:11:35,547 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 37 treesize of output 33 [2021-11-23 03:11:35,686 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 37 treesize of output 33 [2021-11-23 03:11:35,734 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 37 treesize of output 33 [2021-11-23 03:11:35,778 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 37 treesize of output 33 [2021-11-23 03:11:35,893 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 33 treesize of output 29 [2021-11-23 03:11:35,941 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 37 treesize of output 33 [2021-11-23 03:11:35,978 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 37 treesize of output 33 [2021-11-23 03:11:36,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,078 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,135 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:11:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-23 03:11:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,180 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,304 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,353 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,459 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,522 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:11:36,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:11:36,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,567 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,625 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:11:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:11:36,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,760 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:11:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:11:36,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,818 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:36,962 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:36,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,042 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,090 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,181 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,230 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,279 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,416 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:11:37,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:11:37,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,600 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:11:37,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:11:37,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,671 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,728 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:37,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:37,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,800 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:11:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:11:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:37,930 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:11:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:11:37,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:38,001 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:11:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:11:38,010 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:40,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71208#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:11:40,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:40,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:11:40,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-23 03:11:40,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997623239] [2021-11-23 03:11:40,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:40,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-23 03:11:40,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-23 03:11:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2021-11-23 03:11:40,785 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:49,804 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2021-11-23 03:16:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-23 03:16:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2021-11-23 03:16:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:49,852 INFO L225 Difference]: With dead ends: 9848 [2021-11-23 03:16:49,853 INFO L226 Difference]: Without dead ends: 8785 [2021-11-23 03:16:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 2327 SyntacticMatches, 13 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26385 ImplicationChecksByTransitivity, 312.6s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2021-11-23 03:16:49,865 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6634 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 5172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6634 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 6798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5172 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:49,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6634 Valid, 572 Invalid, 6798 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5172 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 20.6s Time] [2021-11-23 03:16:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-11-23 03:16:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2021-11-23 03:16:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.1096570397111913) internal successors, (2459), 2216 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2021-11-23 03:16:50,556 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2021-11-23 03:16:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2021-11-23 03:16:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2021-11-23 03:16:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2021-11-23 03:16:50,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:50,580 INFO L514 BasicCegarLoop]: trace histogram [1520, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:50,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:50,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:50,781 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2021-11-23 03:16:50,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:50,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261086415] [2021-11-23 03:16:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:50,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:50,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:16:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165346115] [2021-11-23 03:16:50,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:50,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:50,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:50,839 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:50,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 03:17:04,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:17:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:17:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2021-11-23 03:17:07,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2021-11-23 03:17:12,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261086415] [2021-11-23 03:17:12,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:17:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165346115] [2021-11-23 03:17:12,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165346115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020095481] [2021-11-23 03:17:12,487 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:17:12,487 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:12,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:12,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:12,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,594 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:17:12,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:17:12,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,689 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:17:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:17:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,752 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 51 treesize of output 53 [2021-11-23 03:17:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:12,954 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:17:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 396 [2021-11-23 03:17:13,036 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 37 treesize of output 33 [2021-11-23 03:17:13,092 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 37 treesize of output 33 [2021-11-23 03:17:13,208 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 37 treesize of output 33 [2021-11-23 03:17:13,291 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 37 treesize of output 33 [2021-11-23 03:17:13,337 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 37 treesize of output 33 [2021-11-23 03:17:13,470 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 33 treesize of output 29 [2021-11-23 03:17:13,529 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 37 treesize of output 33 [2021-11-23 03:17:13,572 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 37 treesize of output 33 [2021-11-23 03:17:13,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:13,684 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:17:13,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:17:13,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:13,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:13,775 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-23 03:17:13,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2021-11-23 03:17:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:13,835 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:13,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:13,945 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:13,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,004 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,098 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,158 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:14,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-23 03:17:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,194 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,239 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:14,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,300 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:17:14,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,337 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,488 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,539 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,594 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,688 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:17:14,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:17:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,852 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:17:14,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:17:14,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,935 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:14,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:14,984 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:14,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,061 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,229 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:15,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:17:15,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,275 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,315 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,379 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,499 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:15,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:17:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:15,540 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:15,545 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:16,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104376#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:16,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:16,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:17:16,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:17:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932594368] [2021-11-23 03:17:16,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:16,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:17:16,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:17:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:16,678 INFO L87 Difference]: Start difference. First operand 2217 states and 2459 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:17,914 INFO L93 Difference]: Finished difference Result 2878 states and 3342 transitions. [2021-11-23 03:17:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:17:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1616 [2021-11-23 03:17:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:17,929 INFO L225 Difference]: With dead ends: 2878 [2021-11-23 03:17:17,929 INFO L226 Difference]: Without dead ends: 2213 [2021-11-23 03:17:17,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4848 GetRequests, 4817 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:17:17,932 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:17,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 20 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:17:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-11-23 03:17:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2204. [2021-11-23 03:17:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.1030413073082161) internal successors, (2430), 2203 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2430 transitions. [2021-11-23 03:17:18,550 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2430 transitions. Word has length 1616 [2021-11-23 03:17:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:18,552 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 2430 transitions. [2021-11-23 03:17:18,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2430 transitions. [2021-11-23 03:17:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2021-11-23 03:17:18,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:18,578 INFO L514 BasicCegarLoop]: trace histogram [1520, 32, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:18,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 03:17:18,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:18,795 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -816145346, now seen corresponding path program 18 times [2021-11-23 03:17:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389117567] [2021-11-23 03:17:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:18,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:18,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:17:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516987605] [2021-11-23 03:17:18,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:18,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:18,857 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:18,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 03:17:19,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:17:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2021-11-23 03:17:21,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2021-11-23 03:17:23,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389117567] [2021-11-23 03:17:23,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:17:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516987605] [2021-11-23 03:17:23,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516987605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601787692] [2021-11-23 03:17:23,859 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:17:23,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:17:23,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:17:23,859 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:17:23,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:17:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:23,943 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-23 03:17:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-23 03:17:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:24,041 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:17:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:17:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:24,112 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 47 treesize of output 49 [2021-11-23 03:17:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:24,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:24,310 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-23 03:17:24,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 398 [2021-11-23 03:17:24,506 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 37 treesize of output 33 [2021-11-23 03:17:24,562 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 37 treesize of output 33 [2021-11-23 03:17:24,678 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 33 treesize of output 29 [2021-11-23 03:17:24,718 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 37 treesize of output 33 [2021-11-23 03:17:24,751 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 37 treesize of output 33 [2021-11-23 03:17:24,851 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 33 treesize of output 29 [2021-11-23 03:17:24,900 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 37 treesize of output 33 [2021-11-23 03:17:24,932 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 37 treesize of output 33 [2021-11-23 03:17:25,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,017 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:17:25,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:17:25,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,191 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:17:25,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2021-11-23 03:17:25,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,252 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:25,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,364 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:17:25,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:17:25,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,410 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:25,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,484 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:17:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:17:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,609 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:17:25,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2021-11-23 03:17:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,664 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:25,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,711 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:25,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,767 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:25,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-23 03:17:25,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,818 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:25,954 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:25,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,070 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-23 03:17:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,125 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,168 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,238 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 03:17:26,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-23 03:17:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,466 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-23 03:17:26,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2021-11-23 03:17:26,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,546 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,583 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,687 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:17:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,776 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-23 03:17:26,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-23 03:17:26,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,825 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,868 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:26,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,956 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-23 03:17:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 03:17:26,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:26,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:27,131 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-23 03:17:27,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2021-11-23 03:17:27,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:17:27,197 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 03:17:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:17:27,202 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:17:28,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123778#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 03:17:28,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:17:28,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:17:28,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-23 03:17:28,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225258628] [2021-11-23 03:17:28,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:28,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:17:28,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:17:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:17:28,537 INFO L87 Difference]: Start difference. First operand 2204 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:32,800 INFO L93 Difference]: Finished difference Result 7531 states and 8391 transitions. [2021-11-23 03:17:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 03:17:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1633 [2021-11-23 03:17:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:32,844 INFO L225 Difference]: With dead ends: 7531 [2021-11-23 03:17:32,845 INFO L226 Difference]: Without dead ends: 6887 [2021-11-23 03:17:32,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4928 GetRequests, 4869 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 03:17:32,849 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:32,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 116 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:17:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-11-23 03:17:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2252. [2021-11-23 03:17:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.104398045313194) internal successors, (2486), 2251 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2486 transitions. [2021-11-23 03:17:33,550 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2486 transitions. Word has length 1633 [2021-11-23 03:17:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:33,551 INFO L470 AbstractCegarLoop]: Abstraction has 2252 states and 2486 transitions. [2021-11-23 03:17:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2486 transitions. [2021-11-23 03:17:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2021-11-23 03:17:33,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:33,614 INFO L514 BasicCegarLoop]: trace histogram [1520, 64, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:33,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:33,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 03:17:33,829 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:17:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1937700894, now seen corresponding path program 19 times [2021-11-23 03:17:33,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351057202] [2021-11-23 03:17:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:33,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:33,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:17:33,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196437731] [2021-11-23 03:17:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:33,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:33,896 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:33,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c16ae9d-bb3c-413b-bd5d-de90d05ba898/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 03:17:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 9755 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-23 03:17:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2021-11-23 03:17:51,855 INFO L328 TraceCheckSpWp]: Computing backward predicates...