./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapsum2.i --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_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/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_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/mapsum2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/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_07406cf3-1fb3-42e6-bbdf-3b969265946a/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 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:30:13,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:30:13,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:30:13,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:30:13,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:30:13,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:30:13,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:30:13,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:30:13,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:30:13,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:30:13,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:30:13,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:30:13,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:30:13,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:30:13,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:30:13,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:30:13,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:30:13,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:30:13,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:30:13,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:30:13,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:30:13,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:30:13,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:30:13,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:30:13,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:30:13,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:30:13,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:30:13,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:30:13,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:30:13,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:30:13,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:30:13,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:30:13,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:30:13,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:30:13,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:30:13,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:30:13,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:30:13,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:30:13,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:30:13,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:30:13,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:30:13,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:30:13,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:30:13,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:30:13,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:30:13,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:30:13,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:30:13,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:30:13,501 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:30:13,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:30:13,501 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:30:13,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:30:13,502 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:30:13,502 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:30:13,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:30:13,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:30:13,502 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:30:13,503 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:30:13,503 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:30:13,503 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:30:13,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:30:13,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:30:13,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:30:13,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:30:13,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:30:13,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:30:13,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:30:13,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:30:13,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:30:13,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:30:13,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:30:13,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:30:13,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:30:13,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:30:13,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:30:13,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:30:13,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:30:13,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:30:13,508 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:30:13,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:30:13,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:30:13,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:30:13,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:30:13,510 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_07406cf3-1fb3-42e6-bbdf-3b969265946a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a [2021-11-23 02:30:13,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:30:13,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:30:13,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:30:13,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:30:13,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:30:13,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-crafted/mapsum2.i [2021-11-23 02:30:13,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/data/f4fddaac8/6b8947e70fda4f8cb611f510ba206785/FLAG799ff8e1d [2021-11-23 02:30:14,509 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:30:14,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/sv-benchmarks/c/array-crafted/mapsum2.i [2021-11-23 02:30:14,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/data/f4fddaac8/6b8947e70fda4f8cb611f510ba206785/FLAG799ff8e1d [2021-11-23 02:30:14,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/data/f4fddaac8/6b8947e70fda4f8cb611f510ba206785 [2021-11-23 02:30:14,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:30:14,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:30:14,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:30:14,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:30:14,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:30:14,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:14" (1/1) ... [2021-11-23 02:30:14,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df43951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:14, skipping insertion in model container [2021-11-23 02:30:14,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:14" (1/1) ... [2021-11-23 02:30:14,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:30:14,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:30:15,138 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_07406cf3-1fb3-42e6-bbdf-3b969265946a/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2021-11-23 02:30:15,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:30:15,151 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:30:15,174 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_07406cf3-1fb3-42e6-bbdf-3b969265946a/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2021-11-23 02:30:15,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:30:15,191 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:30:15,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15 WrapperNode [2021-11-23 02:30:15,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:30:15,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:30:15,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:30:15,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:30:15,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,239 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-11-23 02:30:15,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:30:15,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:30:15,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:30:15,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:30:15,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:30:15,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:30:15,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:30:15,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:30:15,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (1/1) ... [2021-11-23 02:30:15,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:30:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:15,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:30:15,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:30:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:30:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2021-11-23 02:30:15,386 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2021-11-23 02:30:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:30:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:30:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:30:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:30:15,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:30:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:30:15,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:30:15,482 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:30:15,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:30:15,737 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:30:15,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:30:15,776 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:30:15,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:15 BoogieIcfgContainer [2021-11-23 02:30:15,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:30:15,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:30:15,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:30:15,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:30:15,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:30:14" (1/3) ... [2021-11-23 02:30:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609bf7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:15, skipping insertion in model container [2021-11-23 02:30:15,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:15" (2/3) ... [2021-11-23 02:30:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609bf7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:15, skipping insertion in model container [2021-11-23 02:30:15,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:15" (3/3) ... [2021-11-23 02:30:15,789 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2021-11-23 02:30:15,795 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:30:15,796 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:30:15,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:30:15,854 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 02:30:15,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:30:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:30:15,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:15,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:15,882 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1911737406, now seen corresponding path program 1 times [2021-11-23 02:30:15,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:15,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737994919] [2021-11-23 02:30:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:15,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:30:16,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737994919] [2021-11-23 02:30:16,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737994919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:16,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:16,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:30:16,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340057147] [2021-11-23 02:30:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:16,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:16,161 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:30:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:16,210 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 02:30:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-23 02:30:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:16,221 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:30:16,221 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:30:16,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:16,229 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:16,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:30:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 02:30:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-23 02:30:16,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-23 02:30:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:16,267 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-23 02:30:16,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:30:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-23 02:30:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:30:16,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:16,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:16,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:30:16,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -242274518, now seen corresponding path program 1 times [2021-11-23 02:30:16,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553732615] [2021-11-23 02:30:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:16,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:30:16,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553732615] [2021-11-23 02:30:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553732615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041180489] [2021-11-23 02:30:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:16,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:16,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:16,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:16,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:30:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:30:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:30:16,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041180489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:16,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:30:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871564188] [2021-11-23 02:30:16,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:16,511 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:30:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:16,534 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-23 02:30:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 02:30:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:16,536 INFO L225 Difference]: With dead ends: 29 [2021-11-23 02:30:16,536 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:30:16,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:16,539 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:16,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:30:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:30:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 02:30:16,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-23 02:30:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:16,548 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 02:30:16,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:30:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 02:30:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:30:16,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:16,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:16,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:16,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:16,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2071479167, now seen corresponding path program 1 times [2021-11-23 02:30:16,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:16,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019586453] [2021-11-23 02:30:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:16,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:30:16,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019586453] [2021-11-23 02:30:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019586453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680440124] [2021-11-23 02:30:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:16,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:16,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:16,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:30:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:30:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:30:17,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:17,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680440124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:17,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:17,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:30:17,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367117522] [2021-11-23 02:30:17,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:17,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:17,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:17,071 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:30:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:17,111 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-23 02:30:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-23 02:30:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:17,116 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:30:17,116 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:30:17,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:17,118 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:17,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:30:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 02:30:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 02:30:17,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-23 02:30:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:17,127 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 02:30:17,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:30:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 02:30:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:30:17,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:17,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:17,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:17,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:17,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash -535158977, now seen corresponding path program 1 times [2021-11-23 02:30:17,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:17,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627872319] [2021-11-23 02:30:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:17,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:30:17,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627872319] [2021-11-23 02:30:17,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627872319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861302874] [2021-11-23 02:30:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:17,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:17,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:17,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:30:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:30:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:30:17,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:30:17,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861302874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428034128] [2021-11-23 02:30:17,822 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:17,822 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:17,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:17,834 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:17,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:17,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:30:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:30:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,005 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:30:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:18,228 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:30:18,231 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 198 treesize of output 197 [2021-11-23 02:30:18,451 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 25 treesize of output 21 [2021-11-23 02:30:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 02:30:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:18,989 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 02:30:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 02:30:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:19,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:19,136 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 13 treesize of output 9 [2021-11-23 02:30:19,387 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:19,454 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:24,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:24,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:24,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:24,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-23 02:30:24,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808672432] [2021-11-23 02:30:24,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:24,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:30:24,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:30:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:30:24,736 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:24,772 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-23 02:30:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:30:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-23 02:30:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:24,774 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:30:24,774 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:30:24,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:30:24,777 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:30:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:30:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 02:30:24,783 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-23 02:30:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:24,784 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 02:30:24,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 02:30:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:30:24,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:24,786 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:24,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:25,003 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1059918509, now seen corresponding path program 2 times [2021-11-23 02:30:25,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:25,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227445834] [2021-11-23 02:30:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:25,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:30:25,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:25,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227445834] [2021-11-23 02:30:25,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227445834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:25,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486845181] [2021-11-23 02:30:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:30:25,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:25,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:25,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:25,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:30:25,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:30:25,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:25,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:30:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:30:25,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:30:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486845181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610236409] [2021-11-23 02:30:25,393 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:25,393 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:25,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:25,394 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:25,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,444 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:30:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:30:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,478 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:30:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,586 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:30:25,587 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 208 treesize of output 196 [2021-11-23 02:30:25,639 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 25 treesize of output 21 [2021-11-23 02:30:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:30:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,954 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:30:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:30:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:25,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:26,011 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 13 treesize of output 9 [2021-11-23 02:30:26,182 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:26,223 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:29,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_11 4294967296) (+ (- 4294967296) (mod v_mapsum_~ret~0_BEFORE_RETURN_11 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:29,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:29,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:30:29,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560571467] [2021-11-23 02:30:29,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:30:29,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:30:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:30:29,237 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:30:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:29,279 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-23 02:30:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:30:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-23 02:30:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:29,281 INFO L225 Difference]: With dead ends: 38 [2021-11-23 02:30:29,281 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:30:29,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:30:29,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:29,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:30:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 02:30:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 02:30:29,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-23 02:30:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:29,292 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 02:30:29,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:30:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 02:30:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:30:29,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:29,294 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:29,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:29,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:29,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 301103478, now seen corresponding path program 3 times [2021-11-23 02:30:29,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:29,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382613102] [2021-11-23 02:30:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:29,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 02:30:29,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:29,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382613102] [2021-11-23 02:30:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382613102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342081092] [2021-11-23 02:30:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:30:29,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:29,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:29,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:29,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:30:29,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:30:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:30:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:30:29,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:30:29,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342081092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110709962] [2021-11-23 02:30:29,936 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:29,938 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:29,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:29,939 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:29,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:29,978 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:30:29,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:30:29,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,011 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:30,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:30:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:30,150 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:30:30,151 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 198 treesize of output 197 [2021-11-23 02:30:30,255 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 25 treesize of output 21 [2021-11-23 02:30:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:30:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,546 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:30:30,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:30:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:30,598 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 13 treesize of output 9 [2021-11-23 02:30:30,780 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:30,822 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:33,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_18 4294967296) (+ (mod v_mapsum_~ret~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:33,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:33,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:33,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2021-11-23 02:30:33,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246016413] [2021-11-23 02:30:33,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:33,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:30:33,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:30:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:30:33,720 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:33,783 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-23 02:30:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:30:33,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2021-11-23 02:30:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:33,784 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:30:33,784 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 02:30:33,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:30:33,786 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:33,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 02:30:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 02:30:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 02:30:33,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2021-11-23 02:30:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 02:30:33,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:30:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 02:30:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:30:33,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:33,796 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:33,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:34,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:34,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 884522878, now seen corresponding path program 4 times [2021-11-23 02:30:34,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:34,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981866292] [2021-11-23 02:30:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:34,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-23 02:30:34,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981866292] [2021-11-23 02:30:34,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981866292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583143280] [2021-11-23 02:30:34,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:30:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:34,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:34,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:30:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:30:34,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-23 02:30:34,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-23 02:30:34,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583143280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355846398] [2021-11-23 02:30:34,721 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:34,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:34,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:34,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:34,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:34,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,757 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:34,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:30:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:30:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,870 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:30:34,871 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 208 treesize of output 196 [2021-11-23 02:30:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:30:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:34,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:35,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:35,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:30:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,161 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:30:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:30:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:35,210 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 13 treesize of output 9 [2021-11-23 02:30:35,417 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:35,453 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:38,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_24 4294967296) (+ (- 4294967296) (mod v_mapsum_~ret~0_BEFORE_RETURN_24 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:38,409 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:38,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:38,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2021-11-23 02:30:38,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317216151] [2021-11-23 02:30:38,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:38,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:30:38,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:30:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:30:38,414 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:38,494 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-23 02:30:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:30:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-11-23 02:30:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:38,497 INFO L225 Difference]: With dead ends: 62 [2021-11-23 02:30:38,497 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 02:30:38,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:30:38,500 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:38,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 02:30:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 02:30:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-23 02:30:38,509 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2021-11-23 02:30:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-23 02:30:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-23 02:30:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:30:38,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:38,513 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:38,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:38,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:38,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash -49590146, now seen corresponding path program 5 times [2021-11-23 02:30:38,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:38,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558103586] [2021-11-23 02:30:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:38,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-23 02:30:39,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:39,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558103586] [2021-11-23 02:30:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558103586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850330319] [2021-11-23 02:30:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:30:39,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:39,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:39,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:30:39,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:30:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:30:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-23 02:30:39,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-23 02:30:39,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850330319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12945547] [2021-11-23 02:30:39,740 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:39,741 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:39,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:39,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:39,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:30:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:30:39,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,814 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:39,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:30:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:39,907 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:30:39,908 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 208 treesize of output 196 [2021-11-23 02:30:39,944 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 25 treesize of output 21 [2021-11-23 02:30:40,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 02:30:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,204 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-23 02:30:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-23 02:30:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:40,284 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 13 treesize of output 9 [2021-11-23 02:30:40,530 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:40,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:43,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:43,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:43,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:43,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-11-23 02:30:43,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700070835] [2021-11-23 02:30:43,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:43,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:30:43,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:30:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1831, Unknown=1, NotChecked=0, Total=2256 [2021-11-23 02:30:43,758 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:30:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:43,882 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-23 02:30:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 02:30:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2021-11-23 02:30:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:43,890 INFO L225 Difference]: With dead ends: 69 [2021-11-23 02:30:43,890 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 02:30:43,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=424, Invalid=1831, Unknown=1, NotChecked=0, Total=2256 [2021-11-23 02:30:43,893 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:43,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 02:30:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 02:30:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-23 02:30:43,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2021-11-23 02:30:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:43,912 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-23 02:30:43,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:30:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-23 02:30:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:30:43,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:43,916 INFO L514 BasicCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:43,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:44,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:44,117 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1858566262, now seen corresponding path program 6 times [2021-11-23 02:30:44,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951593729] [2021-11-23 02:30:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:44,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:44,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951593729] [2021-11-23 02:30:44,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951593729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425586809] [2021-11-23 02:30:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:30:44,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:44,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:44,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:30:44,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:30:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:44,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:30:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:44,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425586809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503882878] [2021-11-23 02:30:45,682 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:45,682 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:45,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:45,683 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:45,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,720 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:45,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:30:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:30:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,824 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:30:45,825 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 208 treesize of output 196 [2021-11-23 02:30:45,864 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 25 treesize of output 21 [2021-11-23 02:30:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:45,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:46,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 02:30:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:46,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:46,129 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 02:30:46,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 02:30:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:46,230 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 13 treesize of output 9 [2021-11-23 02:30:46,380 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:46,416 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:47,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (exists ((v_mapsum_~ret~0_BEFORE_RETURN_35 Int)) (= (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_35 4294967296) (+ (- 4294967296) (mod v_mapsum_~ret~0_BEFORE_RETURN_35 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:47,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:47,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:47,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2021-11-23 02:30:47,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466182206] [2021-11-23 02:30:47,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:47,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:30:47,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:30:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:30:47,590 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:47,742 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2021-11-23 02:30:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:30:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2021-11-23 02:30:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:47,747 INFO L225 Difference]: With dead ends: 100 [2021-11-23 02:30:47,747 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 02:30:47,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:30:47,752 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:47,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 02:30:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-23 02:30:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-23 02:30:47,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2021-11-23 02:30:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:47,782 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-23 02:30:47,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-23 02:30:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 02:30:47,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:47,791 INFO L514 BasicCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:47,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:48,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:30:48,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -248124130, now seen corresponding path program 7 times [2021-11-23 02:30:48,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442900237] [2021-11-23 02:30:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:48,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:49,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442900237] [2021-11-23 02:30:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442900237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213759209] [2021-11-23 02:30:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:30:49,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:49,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:49,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:30:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 02:30:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:49,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:30:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213759209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891505762] [2021-11-23 02:30:53,015 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:30:53,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:53,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:53,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:53,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,053 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:30:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:30:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:30:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:30:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:53,174 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:30:53,174 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 198 treesize of output 197 [2021-11-23 02:30:53,258 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 25 treesize of output 21 [2021-11-23 02:30:53,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:30:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:30:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,520 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:30:53,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:30:53,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:30:53,564 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 13 treesize of output 9 [2021-11-23 02:30:53,719 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:30:53,756 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:59,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_41 4294967296) (+ (mod v_mapsum_~ret~0_BEFORE_RETURN_41 4294967296) (- 4294967296))))) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:59,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:59,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:59,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2021-11-23 02:30:59,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526875320] [2021-11-23 02:30:59,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:59,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 02:30:59,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 02:30:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2021-11-23 02:30:59,172 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:59,572 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2021-11-23 02:30:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 02:30:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-11-23 02:30:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:59,575 INFO L225 Difference]: With dead ends: 150 [2021-11-23 02:30:59,575 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 02:30:59,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2021-11-23 02:30:59,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:59,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:30:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 02:30:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-23 02:30:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:30:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-23 02:30:59,622 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2021-11-23 02:30:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:59,623 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-23 02:30:59,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:30:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-23 02:30:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:30:59,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:59,630 INFO L514 BasicCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:59,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:30:59,845 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397790, now seen corresponding path program 8 times [2021-11-23 02:30:59,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:59,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941590994] [2021-11-23 02:30:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:59,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-23 02:31:04,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941590994] [2021-11-23 02:31:04,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941590994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28266323] [2021-11-23 02:31:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:31:04,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:04,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:04,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:31:04,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:31:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:31:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:31:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2021-11-23 02:31:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:31:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2021-11-23 02:31:05,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28266323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:31:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859166462] [2021-11-23 02:31:05,293 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:31:05,294 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:31:05,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:31:05,294 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:31:05,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:31:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,330 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:31:05,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:31:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,365 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:31:05,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:31:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:31:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,459 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:31:05,459 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 208 treesize of output 196 [2021-11-23 02:31:05,499 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 25 treesize of output 21 [2021-11-23 02:31:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:31:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:05,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:31:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,741 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:31:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:31:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:31:05,791 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 13 treesize of output 9 [2021-11-23 02:31:05,950 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:31:05,993 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:31:14,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (exists ((v_mapsum_~ret~0_BEFORE_RETURN_47 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_47 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_47 4294967296) (+ (- 4294967296) (mod v_mapsum_~ret~0_BEFORE_RETURN_47 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:31:14,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:31:14,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:31:14,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2021-11-23 02:31:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290136129] [2021-11-23 02:31:14,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:31:14,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-23 02:31:14,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-23 02:31:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-23 02:31:14,121 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:31:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:14,355 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-11-23 02:31:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-23 02:31:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-11-23 02:31:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:14,362 INFO L225 Difference]: With dead ends: 155 [2021-11-23 02:31:14,362 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 02:31:14,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-23 02:31:14,367 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:14,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:31:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 02:31:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-23 02:31:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:31:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-11-23 02:31:14,384 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2021-11-23 02:31:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:14,385 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-11-23 02:31:14,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:31:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-11-23 02:31:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 02:31:14,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:14,390 INFO L514 BasicCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:14,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:14,597 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash 109612682, now seen corresponding path program 9 times [2021-11-23 02:31:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832090414] [2021-11-23 02:31:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:14,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:31:19,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832090414] [2021-11-23 02:31:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832090414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194544770] [2021-11-23 02:31:19,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:31:19,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:19,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:19,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:31:19,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:31:19,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:31:19,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 02:31:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:31:20,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:31:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:31:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194544770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:31:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849432566] [2021-11-23 02:31:32,478 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:31:32,478 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:31:32,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:31:32,479 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:31:32,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:31:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,510 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:31:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:31:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,533 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:31:32,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:31:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:31:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,630 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:31:32,631 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 208 treesize of output 196 [2021-11-23 02:31:32,702 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 25 treesize of output 21 [2021-11-23 02:31:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:31:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:31:32,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,923 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:31:32,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:31:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:32,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:31:32,968 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 13 treesize of output 9 [2021-11-23 02:31:33,083 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:31:33,128 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:31:37,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_54 Int)) (= (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_54 4294967296) (+ (- 4294967296) (mod v_mapsum_~ret~0_BEFORE_RETURN_54 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:31:37,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:31:37,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:31:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2021-11-23 02:31:37,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496430193] [2021-11-23 02:31:37,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:31:37,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 02:31:37,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 02:31:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-23 02:31:37,147 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:31:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:37,762 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2021-11-23 02:31:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 02:31:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2021-11-23 02:31:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:37,765 INFO L225 Difference]: With dead ends: 260 [2021-11-23 02:31:37,766 INFO L226 Difference]: Without dead ends: 231 [2021-11-23 02:31:37,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-23 02:31:37,772 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:37,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:31:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-23 02:31:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-23 02:31:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:31:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2021-11-23 02:31:37,787 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2021-11-23 02:31:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:37,788 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2021-11-23 02:31:37,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:31:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2021-11-23 02:31:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-23 02:31:37,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:37,793 INFO L514 BasicCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:37,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:38,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:31:38,013 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash -137040610, now seen corresponding path program 10 times [2021-11-23 02:31:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105852528] [2021-11-23 02:31:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:31:55,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105852528] [2021-11-23 02:31:55,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105852528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79203780] [2021-11-23 02:31:55,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:31:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:55,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:55,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:31:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 02:31:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:31:56,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:32:48,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79203780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930664866] [2021-11-23 02:32:48,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:32:48,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:48,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:48,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:48,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,236 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:32:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 02:32:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,262 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:32:48,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:32:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:32:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:48,357 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:32:48,358 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 198 treesize of output 197 [2021-11-23 02:32:48,424 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 25 treesize of output 21 [2021-11-23 02:32:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:32:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:32:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,694 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:32:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:32:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:32:48,733 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 13 treesize of output 9 [2021-11-23 02:32:48,877 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:32:48,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:51,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_59 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_59 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_59 4294967296) (+ (mod v_mapsum_~ret~0_BEFORE_RETURN_59 4294967296) (- 4294967296))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:51,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:51,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:32:51,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2021-11-23 02:32:51,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174379949] [2021-11-23 02:32:51,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:51,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 02:32:51,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 02:32:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2021-11-23 02:32:51,951 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:32:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:54,466 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2021-11-23 02:32:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 02:32:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2021-11-23 02:32:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:54,471 INFO L225 Difference]: With dead ends: 462 [2021-11-23 02:32:54,471 INFO L226 Difference]: Without dead ends: 433 [2021-11-23 02:32:54,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2021-11-23 02:32:54,482 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:54,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:32:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-23 02:32:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2021-11-23 02:32:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:32:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2021-11-23 02:32:54,505 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2021-11-23 02:32:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2021-11-23 02:32:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:32:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2021-11-23 02:32:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-23 02:32:54,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:54,517 INFO L514 BasicCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:54,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:32:54,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:32:54,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:54,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:54,742 INFO L85 PathProgramCache]: Analyzing trace with hash 11194526, now seen corresponding path program 11 times [2021-11-23 02:32:54,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:54,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643736225] [2021-11-23 02:32:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:54,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:34:04,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:04,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643736225] [2021-11-23 02:34:04,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643736225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242602803] [2021-11-23 02:34:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:34:04,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:04,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:04,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:34:04,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 02:34:04,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:34:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:34:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2021-11-23 02:34:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2021-11-23 02:34:08,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242602803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906279306] [2021-11-23 02:34:08,240 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:34:08,241 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:34:08,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:34:08,241 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:34:08,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:34:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,283 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:34:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:34:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:34:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:34:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:34:08,373 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:34:08,373 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 198 treesize of output 197 [2021-11-23 02:34:08,422 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 25 treesize of output 21 [2021-11-23 02:34:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:34:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:34:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:34:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,656 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:34:08,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:34:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:08,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:34:08,688 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 13 treesize of output 9 [2021-11-23 02:34:08,795 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:34:08,819 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:34:15,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:34:15,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:34:15,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:34:15,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2021-11-23 02:34:15,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531447962] [2021-11-23 02:34:15,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:34:15,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2021-11-23 02:34:15,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2021-11-23 02:34:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81988, Invalid=104203, Unknown=1, NotChecked=0, Total=186192 [2021-11-23 02:34:15,810 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:34:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:18,224 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2021-11-23 02:34:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2021-11-23 02:34:18,226 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 458 [2021-11-23 02:34:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:18,229 INFO L225 Difference]: With dead ends: 471 [2021-11-23 02:34:18,230 INFO L226 Difference]: Without dead ends: 442 [2021-11-23 02:34:18,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=81988, Invalid=104203, Unknown=1, NotChecked=0, Total=186192 [2021-11-23 02:34:18,250 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:34:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-23 02:34:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-11-23 02:34:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:34:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2021-11-23 02:34:18,274 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2021-11-23 02:34:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2021-11-23 02:34:18,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:34:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2021-11-23 02:34:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-23 02:34:18,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:18,289 INFO L514 BasicCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:18,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:18,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1121507978, now seen corresponding path program 12 times [2021-11-23 02:34:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158686350] [2021-11-23 02:34:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:18,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-23 02:35:24,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158686350] [2021-11-23 02:35:24,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158686350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647120439] [2021-11-23 02:35:24,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:35:24,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:24,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:24,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:24,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:35:25,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:35:25,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:35:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 405 conjunts are in the unsatisfiable core [2021-11-23 02:35:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-23 02:35:26,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:38:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-23 02:38:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647120439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:38:25,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803935855] [2021-11-23 02:38:25,560 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:38:25,560 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:38:25,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:38:25,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:38:25,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:38:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,587 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:38:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:38:25,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:38:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:38:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:38:25,670 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:38:25,670 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 198 treesize of output 197 [2021-11-23 02:38:25,728 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 25 treesize of output 21 [2021-11-23 02:38:25,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:38:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 02:38:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,927 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 02:38:25,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 02:38:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:38:25,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:38:25,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:38:26,103 INFO L197 IcfgInterpreter]: Interpreting procedure mapsum with input of size 12 for LOIs [2021-11-23 02:38:26,125 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:38:30,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_mapsum_~ret~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_mapsum_~ret~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_mapsum_~ret~0_BEFORE_RETURN_72 4294967296) (+ (mod v_mapsum_~ret~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:38:30,830 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:38:30,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:38:30,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2021-11-23 02:38:30,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916147763] [2021-11-23 02:38:30,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:38:30,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2021-11-23 02:38:30,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2021-11-23 02:38:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-23 02:38:30,945 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:38:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:45,114 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2021-11-23 02:38:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-11-23 02:38:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 467 [2021-11-23 02:38:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:45,122 INFO L225 Difference]: With dead ends: 884 [2021-11-23 02:38:45,123 INFO L226 Difference]: Without dead ends: 847 [2021-11-23 02:38:45,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 247.1s TimeCoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-23 02:38:45,223 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:45,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:38:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-23 02:38:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2021-11-23 02:38:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.003562945368171) internal successors, (845), 842 states have internal predecessors, (845), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:38:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2021-11-23 02:38:45,267 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2021-11-23 02:38:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:45,268 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2021-11-23 02:38:45,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:38:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2021-11-23 02:38:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-23 02:38:45,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:45,283 INFO L514 BasicCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:45,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:45,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07406cf3-1fb3-42e6-bbdf-3b969265946a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:38:45,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash -993005282, now seen corresponding path program 13 times [2021-11-23 02:38:45,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:45,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864638852] [2021-11-23 02:38:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:45,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat