./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/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 df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:01:24,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:01:24,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:01:24,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:01:24,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:01:24,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:01:24,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:01:24,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:01:24,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:01:24,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:01:24,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:01:24,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:01:24,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:01:24,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:01:24,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:01:24,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:01:24,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:01:24,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:01:24,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:01:24,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:01:24,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:01:24,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:01:24,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:01:24,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:01:24,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:01:24,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:01:24,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:01:24,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:01:24,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:01:24,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:01:24,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:01:24,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:01:24,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:01:24,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:01:24,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:01:24,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:01:24,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:01:24,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:01:24,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:01:24,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:01:24,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:01:24,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:01:24,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:01:24,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:01:24,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:01:24,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:01:24,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:01:24,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:01:24,458 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:01:24,458 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:01:24,458 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:01:24,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:01:24,460 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:01:24,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:01:24,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:01:24,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:01:24,461 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:01:24,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:01:24,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:01:24,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:01:24,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:01:24,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:01:24,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:01:24,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:01:24,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:01:24,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:01:24,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:01:24,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:01:24,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:01:24,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:01:24,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:01:24,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:01:24,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:01:24,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:01:24,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:01:24,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:01:24,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:01:24,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:01:24,470 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:01:24,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:01:24,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:01:24,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:01:24,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:01:24,471 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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df76811034b688387cfe28dd1eb6de91c21580662ac8ddb8163b41c1d6179172 [2021-11-23 02:01:24,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:01:24,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:01:24,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:01:24,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:01:24,790 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:01:24,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-11-23 02:01:24,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/data/753f93446/1635555b55ad473bb664158c0143e2af/FLAG65abd37ad [2021-11-23 02:01:25,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:01:25,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c [2021-11-23 02:01:25,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/data/753f93446/1635555b55ad473bb664158c0143e2af/FLAG65abd37ad [2021-11-23 02:01:25,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/data/753f93446/1635555b55ad473bb664158c0143e2af [2021-11-23 02:01:25,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:01:25,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:01:25,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:01:25,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:01:25,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:01:25,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:01:25" (1/1) ... [2021-11-23 02:01:25,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2405afba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:25, skipping insertion in model container [2021-11-23 02:01:25,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:01:25" (1/1) ... [2021-11-23 02:01:25,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:01:25,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:01:25,974 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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2021-11-23 02:01:26,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:01:26,015 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:01:26,039 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_0c05f7ac-2dea-42c9-9b14-fae952f1296f/sv-benchmarks/c/array-multidimensional/init-non-constant-3-u.c[333,346] [2021-11-23 02:01:26,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:01:26,084 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:01:26,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26 WrapperNode [2021-11-23 02:01:26,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:01:26,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:26,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:01:26,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:01:26,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,133 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-11-23 02:01:26,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:26,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:01:26,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:01:26,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:01:26,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:01:26,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:01:26,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:01:26,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:01:26,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (1/1) ... [2021-11-23 02:01:26,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:01:26,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:26,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:01:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:01:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:01:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:01:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:01:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:01:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:01:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:01:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:01:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:01:26,339 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:01:26,340 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:01:26,478 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:01:26,516 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:01:26,516 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-23 02:01:26,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:26 BoogieIcfgContainer [2021-11-23 02:01:26,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:01:26,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:01:26,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:01:26,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:01:26,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:01:25" (1/3) ... [2021-11-23 02:01:26,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12adfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:26, skipping insertion in model container [2021-11-23 02:01:26,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:26" (2/3) ... [2021-11-23 02:01:26,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12adfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:26, skipping insertion in model container [2021-11-23 02:01:26,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:26" (3/3) ... [2021-11-23 02:01:26,530 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2021-11-23 02:01:26,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:01:26,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:01:26,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:01:26,603 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 02:01:26,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:01:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:01:26,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:26,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:26,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1256365896, now seen corresponding path program 1 times [2021-11-23 02:01:26,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122465468] [2021-11-23 02:01:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:26,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:26,718 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:26,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222725542] [2021-11-23 02:01:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:26,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:26,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:01:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:01:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:26,913 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 02:01:26,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:01:26,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122465468] [2021-11-23 02:01:26,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222725542] [2021-11-23 02:01:26,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222725542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:26,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:01:26,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459885019] [2021-11-23 02:01:26,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:26,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:01:26,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:01:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:01:27,005 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:27,107 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-11-23 02:01:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:01:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:01:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:27,121 INFO L225 Difference]: With dead ends: 23 [2021-11-23 02:01:27,121 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 02:01:27,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 02:01:27,130 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 02:01:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2021-11-23 02:01:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-11-23 02:01:27,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2021-11-23 02:01:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:27,206 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-11-23 02:01:27,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-11-23 02:01:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:01:27,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:27,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:27,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:27,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:01:27,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash 945982200, now seen corresponding path program 1 times [2021-11-23 02:01:27,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:27,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841348270] [2021-11-23 02:01:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:27,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:27,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:27,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907649760] [2021-11-23 02:01:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:27,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:27,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:27,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:01:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:01:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:27,683 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 02:01:27,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:01:27,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841348270] [2021-11-23 02:01:27,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907649760] [2021-11-23 02:01:27,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907649760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:27,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:27,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:27,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029630373] [2021-11-23 02:01:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:27,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:01:27,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:27,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:01:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:01:27,696 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 02:01:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:27,796 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-23 02:01:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:01:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 02:01:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:27,798 INFO L225 Difference]: With dead ends: 31 [2021-11-23 02:01:27,799 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:01:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:01:27,802 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:27,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:01:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-11-23 02:01:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 02:01:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-23 02:01:27,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2021-11-23 02:01:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:27,820 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-23 02:01:27,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 02:01:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-23 02:01:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:01:27,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:27,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:27,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:28,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1610062143, now seen corresponding path program 1 times [2021-11-23 02:01:28,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252014143] [2021-11-23 02:01:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:28,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:28,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:28,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522622487] [2021-11-23 02:01:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:28,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:28,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:28,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:01:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:01:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:28,214 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 02:01:28,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:01:28,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252014143] [2021-11-23 02:01:28,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522622487] [2021-11-23 02:01:28,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522622487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:28,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:28,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:01:28,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893404745] [2021-11-23 02:01:28,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:28,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:01:28,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:01:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:01:28,218 INFO L87 Difference]: Start difference. First operand 14 states and 19 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 02:01:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:28,295 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-11-23 02:01:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:01:28,297 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 02:01:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:28,298 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:01:28,298 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:01:28,299 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 02:01:28,300 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:28,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:01:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-23 02:01:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-23 02:01:28,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2021-11-23 02:01:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:28,309 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-23 02:01:28,309 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 02:01:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-11-23 02:01:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:01:28,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:28,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:28,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:01:28,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash 329749102, now seen corresponding path program 1 times [2021-11-23 02:01:28,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:28,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796043082] [2021-11-23 02:01:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:28,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:28,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557087603] [2021-11-23 02:01:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:28,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:28,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:28,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:01:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:28,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:01:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:28,696 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 02:01:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:28,770 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 02:01:28,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796043082] [2021-11-23 02:01:28,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557087603] [2021-11-23 02:01:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557087603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465817818] [2021-11-23 02:01:28,803 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:28,803 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:28,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:28,820 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:28,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:28,979 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-23 02:01:28,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2021-11-23 02:01:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:29,060 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 02:01:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:29,991 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-11-23 02:01:29,992 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 287 treesize of output 284 [2021-11-23 02:01:30,148 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 02:01:30,310 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 02:01:30,442 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 02:01:30,681 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:31,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:31,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:31,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 02:01:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609749875] [2021-11-23 02:01:31,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:01:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:01:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:01:31,300 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:31,454 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2021-11-23 02:01:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:01:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 02:01:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:31,459 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:01:31,460 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 02:01:31,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:01:31,467 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:31,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 12 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 02:01:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-11-23 02:01:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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 02:01:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-11-23 02:01:31,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2021-11-23 02:01:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:31,484 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-11-23 02:01:31,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-11-23 02:01:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:01:31,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:31,486 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:31,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:31,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:31,705 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -926683905, now seen corresponding path program 2 times [2021-11-23 02:01:31,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:31,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760773854] [2021-11-23 02:01:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:31,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:31,709 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697990148] [2021-11-23 02:01:31,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:01:31,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:31,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:31,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:01:31,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:01:31,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:01:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:01:31,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:01:31,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:01:31,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760773854] [2021-11-23 02:01:31,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697990148] [2021-11-23 02:01:31,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697990148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948569687] [2021-11-23 02:01:31,867 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:31,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:31,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:31,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:31,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:31,910 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-23 02:01:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2021-11-23 02:01:31,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:31,950 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:31,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:32,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 02:01:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:32,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:32,343 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-11-23 02:01:32,344 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 287 treesize of output 284 [2021-11-23 02:01:32,438 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 02:01:32,567 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 02:01:32,675 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 02:01:32,884 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:33,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:33,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:33,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:33,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-23 02:01:33,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225542416] [2021-11-23 02:01:33,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:33,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:01:33,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:01:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:01:33,290 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:01:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:33,354 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-11-23 02:01:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:01:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 15 [2021-11-23 02:01:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:33,357 INFO L225 Difference]: With dead ends: 70 [2021-11-23 02:01:33,357 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 02:01:33,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:01:33,359 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:33,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 13 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 02:01:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 02:01:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 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 02:01:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-23 02:01:33,375 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 15 [2021-11-23 02:01:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:33,376 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-23 02:01:33,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:01:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-23 02:01:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:01:33,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:33,379 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:33,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:33,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:33,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1016313900, now seen corresponding path program 3 times [2021-11-23 02:01:33,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:33,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025418087] [2021-11-23 02:01:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:33,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:33,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244253566] [2021-11-23 02:01:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:01:33,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:33,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:33,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:01:33,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:01:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:01:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:01:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 02:01:33,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 02:01:33,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025418087] [2021-11-23 02:01:33,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:33,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244253566] [2021-11-23 02:01:33,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244253566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:33,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367256051] [2021-11-23 02:01:33,948 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:33,948 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:33,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:33,949 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:33,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:33,989 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-23 02:01:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2021-11-23 02:01:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:34,030 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:34,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:34,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-23 02:01:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:34,417 INFO L354 Elim1Store]: treesize reduction 159, result has 17.6 percent of original size [2021-11-23 02:01:34,417 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 280 treesize of output 283 [2021-11-23 02:01:34,536 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 02:01:34,690 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 02:01:34,788 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 02:01:34,979 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:35,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1094#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:35,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:35,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:35,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-23 02:01:35,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990144356] [2021-11-23 02:01:35,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:35,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:01:35,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:01:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:01:35,479 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:01:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:35,905 INFO L93 Difference]: Finished difference Result 232 states and 289 transitions. [2021-11-23 02:01:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 02:01:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 39 [2021-11-23 02:01:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:35,908 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:01:35,909 INFO L226 Difference]: Without dead ends: 189 [2021-11-23 02:01:35,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=1057, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:01:35,911 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:35,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 86 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:01:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-23 02:01:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-11-23 02:01:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2545454545454546) internal successors, (207), 165 states have internal predecessors, (207), 0 states have call successors, (0), 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 02:01:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2021-11-23 02:01:35,940 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 39 [2021-11-23 02:01:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:35,940 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2021-11-23 02:01:35,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:01:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2021-11-23 02:01:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:01:35,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:35,946 INFO L514 BasicCegarLoop]: trace histogram [64, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:35,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:36,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:36,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 847538728, now seen corresponding path program 4 times [2021-11-23 02:01:36,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:36,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68198516] [2021-11-23 02:01:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:36,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:36,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:36,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123899013] [2021-11-23 02:01:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:01:36,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:36,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:36,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:01:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:01:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2021-11-23 02:01:36,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2021-11-23 02:01:36,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68198516] [2021-11-23 02:01:36,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123899013] [2021-11-23 02:01:36,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123899013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340793651] [2021-11-23 02:01:36,882 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:36,883 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:36,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:36,883 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:36,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,958 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:36,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:36,978 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 0 case distinctions, treesize of input 28 treesize of output 36 [2021-11-23 02:01:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-23 02:01:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:37,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:37,420 INFO L354 Elim1Store]: treesize reduction 159, result has 17.6 percent of original size [2021-11-23 02:01:37,421 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 280 treesize of output 283 [2021-11-23 02:01:37,530 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 02:01:37,680 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 33 treesize of output 29 [2021-11-23 02:01:37,809 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 02:01:38,051 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:38,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2539#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:38,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:38,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 02:01:38,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116750724] [2021-11-23 02:01:38,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:38,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:01:38,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:01:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:01:38,424 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 02:01:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:38,626 INFO L93 Difference]: Finished difference Result 511 states and 727 transitions. [2021-11-23 02:01:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:01:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 111 [2021-11-23 02:01:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:38,629 INFO L225 Difference]: With dead ends: 511 [2021-11-23 02:01:38,630 INFO L226 Difference]: Without dead ends: 353 [2021-11-23 02:01:38,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:01:38,632 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:38,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 30 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:01:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-23 02:01:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 334. [2021-11-23 02:01:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.1981981981981982) internal successors, (399), 333 states have internal predecessors, (399), 0 states have call successors, (0), 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 02:01:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 399 transitions. [2021-11-23 02:01:38,680 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 399 transitions. Word has length 111 [2021-11-23 02:01:38,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:38,680 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 399 transitions. [2021-11-23 02:01:38,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 02:01:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 399 transitions. [2021-11-23 02:01:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 02:01:38,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:38,689 INFO L514 BasicCegarLoop]: trace histogram [160, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:38,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:38,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:01:38,905 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1109365208, now seen corresponding path program 5 times [2021-11-23 02:01:38,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:38,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463584118] [2021-11-23 02:01:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:38,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:38,917 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707866764] [2021-11-23 02:01:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:01:38,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:38,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:38,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:01:39,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-23 02:01:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:01:39,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:01:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2021-11-23 02:01:40,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 23 proven. 1870 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2021-11-23 02:01:41,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463584118] [2021-11-23 02:01:41,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707866764] [2021-11-23 02:01:41,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707866764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377530170] [2021-11-23 02:01:41,122 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:41,123 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:41,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:41,123 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:41,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:41,170 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:41,182 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 0 case distinctions, treesize of input 28 treesize of output 36 [2021-11-23 02:01:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-23 02:01:41,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:41,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:41,546 INFO L354 Elim1Store]: treesize reduction 159, result has 17.6 percent of original size [2021-11-23 02:01:41,547 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 280 treesize of output 283 [2021-11-23 02:01:41,647 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 02:01:41,748 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 02:01:41,850 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 02:01:42,021 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:42,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5385#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:42,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:42,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:42,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-23 02:01:42,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958840557] [2021-11-23 02:01:42,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:42,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:01:42,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:01:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=585, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:01:42,393 INFO L87 Difference]: Start difference. First operand 334 states and 399 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 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 02:01:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:42,922 INFO L93 Difference]: Finished difference Result 1033 states and 1429 transitions. [2021-11-23 02:01:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:01:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 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 207 [2021-11-23 02:01:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:42,927 INFO L225 Difference]: With dead ends: 1033 [2021-11-23 02:01:42,928 INFO L226 Difference]: Without dead ends: 713 [2021-11-23 02:01:42,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 587 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=726, Invalid=1080, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:01:42,932 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 398 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:42,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 66 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:01:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-23 02:01:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 670. [2021-11-23 02:01:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.1704035874439462) internal successors, (783), 669 states have internal predecessors, (783), 0 states have call successors, (0), 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 02:01:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 783 transitions. [2021-11-23 02:01:42,998 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 783 transitions. Word has length 207 [2021-11-23 02:01:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:42,999 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 783 transitions. [2021-11-23 02:01:42,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 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 02:01:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 783 transitions. [2021-11-23 02:01:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 02:01:43,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:43,009 INFO L514 BasicCegarLoop]: trace histogram [352, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:43,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:43,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1325926872, now seen corresponding path program 6 times [2021-11-23 02:01:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868671303] [2021-11-23 02:01:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:43,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:43,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:43,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274321757] [2021-11-23 02:01:43,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:01:43,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:43,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:43,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:43,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:01:43,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:01:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:01:43,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:01:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2021-11-23 02:01:44,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2021-11-23 02:01:45,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868671303] [2021-11-23 02:01:45,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274321757] [2021-11-23 02:01:45,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274321757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159410232] [2021-11-23 02:01:45,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:45,993 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:45,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:45,993 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:45,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:46,037 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:46,049 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 0 case distinctions, treesize of input 28 treesize of output 36 [2021-11-23 02:01:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-23 02:01:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:46,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:46,403 INFO L354 Elim1Store]: treesize reduction 159, result has 17.6 percent of original size [2021-11-23 02:01:46,405 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 280 treesize of output 283 [2021-11-23 02:01:46,504 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 02:01:46,604 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 33 treesize of output 29 [2021-11-23 02:01:46,687 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 02:01:46,863 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:47,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10999#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:47,396 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:47,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:47,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-11-23 02:01:47,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480679586] [2021-11-23 02:01:47,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:47,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 02:01:47,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 02:01:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1264, Invalid=2768, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:01:47,402 INFO L87 Difference]: Start difference. First operand 670 states and 783 transitions. Second operand has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 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 02:01:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:50,812 INFO L93 Difference]: Finished difference Result 2380 states and 2716 transitions. [2021-11-23 02:01:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-23 02:01:50,813 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 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 399 [2021-11-23 02:01:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:50,822 INFO L225 Difference]: With dead ends: 2380 [2021-11-23 02:01:50,823 INFO L226 Difference]: Without dead ends: 1809 [2021-11-23 02:01:50,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1132 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10947 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8547, Invalid=19509, Unknown=0, NotChecked=0, Total=28056 [2021-11-23 02:01:50,834 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 464 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:50,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 536 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:01:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-11-23 02:01:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1654. [2021-11-23 02:01:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.1669691470054446) internal successors, (1929), 1653 states have internal predecessors, (1929), 0 states have call successors, (0), 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 02:01:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1929 transitions. [2021-11-23 02:01:50,987 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1929 transitions. Word has length 399 [2021-11-23 02:01:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 1929 transitions. [2021-11-23 02:01:50,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 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 02:01:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1929 transitions. [2021-11-23 02:01:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2021-11-23 02:01:51,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:51,036 INFO L514 BasicCegarLoop]: trace histogram [880, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:51,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:51,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:51,253 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1847031600, now seen corresponding path program 7 times [2021-11-23 02:01:51,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242832527] [2021-11-23 02:01:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:51,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:51,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471977938] [2021-11-23 02:01:51,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:01:51,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:51,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:51,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:51,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:01:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 3858 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:01:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2021-11-23 02:01:53,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2021-11-23 02:01:55,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242832527] [2021-11-23 02:01:55,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:01:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471977938] [2021-11-23 02:01:55,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471977938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032818859] [2021-11-23 02:01:55,740 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:01:55,740 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:55,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:55,741 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:55,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:55,782 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:01:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 02:01:55,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:55,797 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 0 case distinctions, treesize of input 28 treesize of output 36 [2021-11-23 02:01:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:55,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 02:01:56,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:56,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:56,086 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-11-23 02:01:56,087 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 287 treesize of output 284 [2021-11-23 02:01:56,179 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 02:01:56,334 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 02:01:56,417 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 02:01:56,553 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:56,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24486#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|) 4294967296) (mod |ULTIMATE.start_main_#t~mem5#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem5#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))))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2021-11-23 02:01:56,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:56,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:01:56,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-23 02:01:56,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43031158] [2021-11-23 02:01:56,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:56,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 02:01:56,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 02:01:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=1725, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:01:56,992 INFO L87 Difference]: Start difference. First operand 1654 states and 1929 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 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 02:01:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:58,875 INFO L93 Difference]: Finished difference Result 5053 states and 6997 transitions. [2021-11-23 02:01:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 02:01:58,876 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 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 975 [2021-11-23 02:01:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:58,896 INFO L225 Difference]: With dead ends: 5053 [2021-11-23 02:01:58,896 INFO L226 Difference]: Without dead ends: 3425 [2021-11-23 02:01:58,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2946 GetRequests, 2867 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2574, Invalid=3588, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 02:01:58,925 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 782 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:58,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 138 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:01:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-11-23 02:01:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3334. [2021-11-23 02:01:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.1548154815481548) internal successors, (3849), 3333 states have internal predecessors, (3849), 0 states have call successors, (0), 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 02:01:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 3849 transitions. [2021-11-23 02:01:59,184 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 3849 transitions. Word has length 975 [2021-11-23 02:01:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:59,185 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 3849 transitions. [2021-11-23 02:01:59,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 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 02:01:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 3849 transitions. [2021-11-23 02:01:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1936 [2021-11-23 02:01:59,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:59,213 INFO L514 BasicCegarLoop]: trace histogram [1840, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:59,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:59,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:01:59,440 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 340447440, now seen corresponding path program 8 times [2021-11-23 02:01:59,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184255323] [2021-11-23 02:01:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:59,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:59,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:01:59,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692482153] [2021-11-23 02:01:59,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:01:59,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:59,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:59,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c05f7ac-2dea-42c9-9b14-fae952f1296f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process