./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF --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 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:00,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:00,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:00,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:00,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:00,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:00,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:00,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:00,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:00,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:00,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:00,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:00,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:00,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:00,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:00,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:00,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:00,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:00,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:00,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:00,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:00,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:00,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:00,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:00,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:00,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:00,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:00,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:00,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:00,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:00,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:00,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:00,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:00,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:00,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:00,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:00,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:00,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:00,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:00,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:00,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:00,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:00,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:00,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:00,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:00,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:00,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:00,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:00,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:00,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:00,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:00,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:00,520 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:00,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:00,521 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:00,521 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:00,521 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:00,522 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:00,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:00,523 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:00,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:00,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:00,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:00,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:00,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:00,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:00,525 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:00,525 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:00,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:00,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:00,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:00,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:00,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:00,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:00,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:00,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:00,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:00,528 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:00,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:00,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:00,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:00,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:00,530 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_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2021-11-13 01:31:00,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:00,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:00,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:00,867 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:00,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:00,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-11-13 01:31:00,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/data/12717e644/f1aa42975ff84918ae7fbf858f8d53dd/FLAGa2c55dd1f [2021-11-13 01:31:01,617 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:01,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-11-13 01:31:01,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/data/12717e644/f1aa42975ff84918ae7fbf858f8d53dd/FLAGa2c55dd1f [2021-11-13 01:31:01,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/data/12717e644/f1aa42975ff84918ae7fbf858f8d53dd [2021-11-13 01:31:01,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:01,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:01,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:01,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:02,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:02,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:01" (1/1) ... [2021-11-13 01:31:02,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f050f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02, skipping insertion in model container [2021-11-13 01:31:02,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:01" (1/1) ... [2021-11-13 01:31:02,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:02,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:02,242 WARN L228 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_6912b100-4184-410e-9c45-2aaf84b48899/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-11-13 01:31:02,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:02,269 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:31:02,284 WARN L228 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_6912b100-4184-410e-9c45-2aaf84b48899/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-11-13 01:31:02,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:02,307 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:31:02,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02 WrapperNode [2021-11-13 01:31:02,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:02,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:02,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:31:02,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:31:02,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:02,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:31:02,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:31:02,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:31:02,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:31:02,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:31:02,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:31:02,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:31:02,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (1/1) ... [2021-11-13 01:31:02,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:02,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:31:02,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:31:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:31:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:31:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:31:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:31:02,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:31:02,792 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 01:31:02,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:02 BoogieIcfgContainer [2021-11-13 01:31:02,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:31:02,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:31:02,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:31:02,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:31:02,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:31:01" (1/3) ... [2021-11-13 01:31:02,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dee4980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:02, skipping insertion in model container [2021-11-13 01:31:02,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:02" (2/3) ... [2021-11-13 01:31:02,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dee4980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:02, skipping insertion in model container [2021-11-13 01:31:02,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:02" (3/3) ... [2021-11-13 01:31:02,807 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-11-13 01:31:02,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:31:02,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:31:02,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:31:02,933 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 [2021-11-13 01:31:02,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:31:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-13 01:31:02,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:02,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-13 01:31:02,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:02,995 INFO L85 PathProgramCache]: Analyzing trace with hash 83509459, now seen corresponding path program 1 times [2021-11-13 01:31:03,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:03,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405222279] [2021-11-13 01:31:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:03,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:03,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:03,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405222279] [2021-11-13 01:31:03,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405222279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:03,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:03,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:31:03,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236993187] [2021-11-13 01:31:03,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:31:03,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:31:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:31:03,364 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:03,443 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2021-11-13 01:31:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:31:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-13 01:31:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:03,455 INFO L225 Difference]: With dead ends: 16 [2021-11-13 01:31:03,465 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 01:31:03,468 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 [2021-11-13 01:31:03,473 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.17ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:03,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 54.17ms Time] [2021-11-13 01:31:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 01:31:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-11-13 01:31:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-13 01:31:03,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-13 01:31:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:03,520 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-13 01:31:03,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-13 01:31:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 01:31:03,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:03,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 01:31:03,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:31:03,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1706004946, now seen corresponding path program 1 times [2021-11-13 01:31:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:03,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33215916] [2021-11-13 01:31:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:03,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:03,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33215916] [2021-11-13 01:31:03,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33215916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:03,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600493916] [2021-11-13 01:31:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:03,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:03,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:03,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:03,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:31:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:03,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:03,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600493916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:03,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919063328] [2021-11-13 01:31:03,874 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:03,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:03,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:03,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:03,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:03,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:03,942 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:03,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:03,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:03,953 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:03,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:03,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:03,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:04,007 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-13 01:31:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:04,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:04,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:04,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:04,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:04,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:04,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:04,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:04,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,258 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:04,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:04,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:04,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:04,292 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:04,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-13 01:31:04,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:04,408 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:04,416 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:04,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:04,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:04,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:04,445 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:04,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:04,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:05,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:05,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:05,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 01:31:05,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725863417] [2021-11-13 01:31:05,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:31:05,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:31:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:31:05,439 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:05,468 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-13 01:31:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:31:05,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-13 01:31:05,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:05,470 INFO L225 Difference]: With dead ends: 19 [2021-11-13 01:31:05,470 INFO L226 Difference]: Without dead ends: 12 [2021-11-13 01:31:05,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:31:05,472 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:05,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [8 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 21.95ms Time] [2021-11-13 01:31:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-13 01:31:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-13 01:31:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-13 01:31:05,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-13 01:31:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:05,479 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-13 01:31:05,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-13 01:31:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 01:31:05,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:05,481 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-13 01:31:05,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 01:31:05,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:05,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1077395565, now seen corresponding path program 2 times [2021-11-13 01:31:05,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:05,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457133047] [2021-11-13 01:31:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:05,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:05,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:05,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457133047] [2021-11-13 01:31:05,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457133047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:05,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621267368] [2021-11-13 01:31:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:31:05,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:05,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:05,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:05,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:31:05,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:31:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:05,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:31:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:05,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:06,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621267368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:06,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900170828] [2021-11-13 01:31:06,046 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:06,047 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:06,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:06,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:06,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:06,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,074 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:06,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:06,084 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:06,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:06,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:06,109 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-13 01:31:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:06,143 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:06,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:06,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:06,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:06,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:06,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:06,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:06,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:06,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:06,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:06,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:06,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:06,249 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:06,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-13 01:31:06,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:06,325 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:06,331 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:06,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:06,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:06,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:06,357 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:06,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:06,376 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:07,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:07,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:07,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-13 01:31:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804835846] [2021-11-13 01:31:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:31:07,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:31:07,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:31:07,115 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:07,165 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-13 01:31:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:31:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 01:31:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:07,167 INFO L225 Difference]: With dead ends: 28 [2021-11-13 01:31:07,167 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 01:31:07,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:31:07,169 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:07,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 30 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 39.61ms Time] [2021-11-13 01:31:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 01:31:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-13 01:31:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-13 01:31:07,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-13 01:31:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:07,176 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-13 01:31:07,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-13 01:31:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 01:31:07,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:07,178 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-13 01:31:07,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:07,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1215485517, now seen corresponding path program 3 times [2021-11-13 01:31:07,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:07,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936837847] [2021-11-13 01:31:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:07,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:07,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:07,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936837847] [2021-11-13 01:31:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936837847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:07,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656671054] [2021-11-13 01:31:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:31:07,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:07,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:07,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:07,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:31:07,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:31:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:31:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:07,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656671054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:07,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125862679] [2021-11-13 01:31:07,994 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:07,994 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:07,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:07,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:07,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:08,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,003 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:08,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:08,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:08,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:08,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:08,019 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-13 01:31:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:08,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:08,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:08,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:08,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:08,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:08,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:08,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:08,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:08,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:08,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:08,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:08,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:08,132 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:08,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-13 01:31:08,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:08,201 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:08,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:08,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:08,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:08,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:08,230 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:08,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:08,252 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:08,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:08,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:08,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-13 01:31:08,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693904281] [2021-11-13 01:31:08,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:08,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:31:08,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:31:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:31:08,975 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:09,043 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-13 01:31:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 01:31:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-13 01:31:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:09,044 INFO L225 Difference]: With dead ends: 46 [2021-11-13 01:31:09,045 INFO L226 Difference]: Without dead ends: 30 [2021-11-13 01:31:09,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:31:09,047 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.87ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:09,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 52 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [23 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 51.87ms Time] [2021-11-13 01:31:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-13 01:31:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-13 01:31:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-13 01:31:09,054 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-13 01:31:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:09,055 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-13 01:31:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-13 01:31:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 01:31:09,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:09,057 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-13 01:31:09,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:09,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:09,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -514279949, now seen corresponding path program 4 times [2021-11-13 01:31:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:09,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399814258] [2021-11-13 01:31:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:09,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:09,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:09,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399814258] [2021-11-13 01:31:09,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399814258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:09,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063675583] [2021-11-13 01:31:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:31:09,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:09,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:09,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:31:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:09,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 01:31:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:09,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:10,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063675583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:10,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403667933] [2021-11-13 01:31:10,859 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:10,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:10,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:10,859 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:10,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:10,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,866 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:10,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:10,868 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:10,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:10,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:10,875 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-13 01:31:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:10,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:10,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:10,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:10,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:10,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:10,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:10,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:10,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:10,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:10,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:10,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:10,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:10,942 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:10,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-13 01:31:10,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:10,988 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:10,992 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:10,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:10,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:10,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:11,014 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:11,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:11,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:11,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:11,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:11,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-13 01:31:11,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835084383] [2021-11-13 01:31:11,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:11,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 01:31:11,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 01:31:11,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 01:31:11,754 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:11,893 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-11-13 01:31:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 01:31:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 01:31:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:11,898 INFO L225 Difference]: With dead ends: 82 [2021-11-13 01:31:11,899 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 01:31:11,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 01:31:11,903 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.76ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:11,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [34 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 76.76ms Time] [2021-11-13 01:31:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 01:31:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-13 01:31:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-13 01:31:11,924 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-13 01:31:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:11,924 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-13 01:31:11,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-13 01:31:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 01:31:11,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:11,930 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-13 01:31:11,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:12,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 01:31:12,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1443975565, now seen corresponding path program 5 times [2021-11-13 01:31:12,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:12,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787229994] [2021-11-13 01:31:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:12,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:13,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787229994] [2021-11-13 01:31:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787229994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505652376] [2021-11-13 01:31:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:31:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:13,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:13,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:31:13,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-13 01:31:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 01:31:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:13,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505652376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137149249] [2021-11-13 01:31:16,950 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:16,950 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:16,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:16,950 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:16,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:16,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:16,973 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:16,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:16,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:16,976 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:16,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:16,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:16,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:16,987 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-13 01:31:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:16,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:16,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:16,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:16,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:16,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:17,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:17,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:17,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:17,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:17,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:17,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:17,041 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:17,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:17,052 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:17,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-13 01:31:17,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:17,099 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:17,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:17,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:17,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:17,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:17,121 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:17,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:17,133 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:17,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:17,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:17,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-13 01:31:17,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444329708] [2021-11-13 01:31:17,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:17,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-13 01:31:17,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-13 01:31:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4761, Invalid=5339, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 01:31:17,903 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:18,185 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2021-11-13 01:31:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-13 01:31:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-13 01:31:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:18,188 INFO L225 Difference]: With dead ends: 154 [2021-11-13 01:31:18,188 INFO L226 Difference]: Without dead ends: 102 [2021-11-13 01:31:18,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4761, Invalid=5339, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 01:31:18,196 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:18,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 163 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [59 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 128.34ms Time] [2021-11-13 01:31:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-13 01:31:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-13 01:31:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-13 01:31:18,225 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-13 01:31:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:18,225 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-13 01:31:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-13 01:31:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:31:18,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:18,233 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-13 01:31:18,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 01:31:18,447 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1563025549, now seen corresponding path program 6 times [2021-11-13 01:31:18,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:18,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578497552] [2021-11-13 01:31:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:18,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:22,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:22,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578497552] [2021-11-13 01:31:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578497552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:22,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361238313] [2021-11-13 01:31:22,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:31:22,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:22,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:22,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 01:31:22,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:31:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:31:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-13 01:31:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:22,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:33,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361238313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:33,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48359584] [2021-11-13 01:31:33,353 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:31:33,353 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:31:33,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:31:33,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:31:33,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:31:33,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:33,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:31:33,380 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:33,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:31:33,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:31:33,386 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-13 01:31:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:31:33,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:33,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:31:33,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:33,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:31:33,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:33,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:31:33,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:31:33,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:33,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:31:33,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:31:33,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:31:33,454 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:31:33,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-13 01:31:33,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:31:33,495 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:31:33,497 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:31:33,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:33,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:31:33,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:31:33,509 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:31:33,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:31:33,521 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:31:34,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:31:34,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:31:34,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-11-13 01:31:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632104095] [2021-11-13 01:31:34,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:31:34,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-13 01:31:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:31:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-13 01:31:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18729, Invalid=19883, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 01:31:34,433 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:35,121 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2021-11-13 01:31:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-13 01:31:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-13 01:31:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:35,131 INFO L225 Difference]: With dead ends: 298 [2021-11-13 01:31:35,131 INFO L226 Difference]: Without dead ends: 198 [2021-11-13 01:31:35,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18729, Invalid=19883, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 01:31:35,138 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:35,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 307 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [108 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 239.36ms Time] [2021-11-13 01:31:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-13 01:31:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-13 01:31:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-13 01:31:35,187 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-13 01:31:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:35,189 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-13 01:31:35,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-13 01:31:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 01:31:35,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:35,196 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-13 01:31:35,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:35,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:35,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash 294846835, now seen corresponding path program 7 times [2021-11-13 01:31:35,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:31:35,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999975420] [2021-11-13 01:31:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:35,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:31:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:48,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:31:48,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999975420] [2021-11-13 01:31:48,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999975420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:48,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623860516] [2021-11-13 01:31:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:31:48,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:48,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:48,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 01:31:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-13 01:31:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:49,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:32:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623860516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:26,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913938283] [2021-11-13 01:32:26,857 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:32:26,857 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:32:26,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:32:26,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:32:26,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:32:26,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,862 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:32:26,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:32:26,863 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:32:26,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:32:26,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:32:26,870 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-13 01:32:26,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:32:26,895 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:32:26,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:32:26,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:32:26,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:32:26,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:32:26,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:32:26,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:32:26,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:32:26,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:32:26,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:32:26,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:32:26,943 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:32:26,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-13 01:32:26,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:32:26,975 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:32:26,977 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:32:26,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:26,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:32:26,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:32:26,986 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:32:26,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:32:26,995 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:32:28,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:32:28,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:32:28,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2021-11-13 01:32:28,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249399238] [2021-11-13 01:32:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:32:28,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-13 01:32:28,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:32:28,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-13 01:32:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74313, Invalid=76619, Unknown=0, NotChecked=0, Total=150932 [2021-11-13 01:32:28,146 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:29,858 INFO L93 Difference]: Finished difference Result 586 states and 780 transitions. [2021-11-13 01:32:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-13 01:32:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 01:32:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:29,863 INFO L225 Difference]: With dead ends: 586 [2021-11-13 01:32:29,863 INFO L226 Difference]: Without dead ends: 390 [2021-11-13 01:32:29,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=74313, Invalid=76619, Unknown=0, NotChecked=0, Total=150932 [2021-11-13 01:32:29,875 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.15ms SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.23ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:29,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 595 Unknown, 0 Unchecked, 5.15ms Time], IncrementalHoareTripleChecker [204 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 316.23ms Time] [2021-11-13 01:32:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-13 01:32:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2021-11-13 01:32:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-13 01:32:29,899 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-13 01:32:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:29,900 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-13 01:32:29,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 385 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-13 01:32:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-13 01:32:29,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:29,910 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-13 01:32:29,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 01:32:30,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-13 01:32:30,135 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -758856333, now seen corresponding path program 8 times [2021-11-13 01:32:30,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:32:30,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073072662] [2021-11-13 01:32:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:30,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:32:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:17,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:17,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073072662] [2021-11-13 01:33:17,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073072662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:33:17,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168134536] [2021-11-13 01:33:17,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:33:17,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:33:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:33:17,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:33:17,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 01:33:19,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-13 01:33:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:33:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-13 01:33:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168134536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:44,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354250253] [2021-11-13 01:35:44,057 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-13 01:35:44,057 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:35:44,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:35:44,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:35:44,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:35:44,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,065 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:35:44,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:35:44,066 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:35:44,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:35:44,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 01:35:44,069 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-13 01:35:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 01:35:44,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:35:44,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 01:35:44,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 01:35:44,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:44,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 01:35:44,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:35:44,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 01:35:44,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 01:35:44,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:35:44,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 01:35:44,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-13 01:35:44,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-13 01:35:44,152 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-11-13 01:35:44,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-13 01:35:44,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 01:35:44,185 INFO L180 QuantifierPusher]: treesize reduction 42, result has 63.5 percent of original size [2021-11-13 01:35:44,187 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:35:44,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:44,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-13 01:35:44,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-11-13 01:35:44,196 INFO L180 QuantifierPusher]: treesize reduction 46, result has 75.8 percent of original size [2021-11-13 01:35:44,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-13 01:35:44,208 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 01:35:45,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 01:35:45,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:35:45,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2021-11-13 01:35:45,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488277263] [2021-11-13 01:35:45,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:35:45,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-13 01:35:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:35:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-13 01:35:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296073, Invalid=300683, Unknown=0, NotChecked=0, Total=596756 [2021-11-13 01:35:45,750 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 769 states, 769 states have (on average 1.0052015604681404) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:00,039 INFO L93 Difference]: Finished difference Result 1162 states and 1548 transitions. [2021-11-13 01:36:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-13 01:36:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0052015604681404) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-11-13 01:36:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:00,045 INFO L225 Difference]: With dead ends: 1162 [2021-11-13 01:36:00,045 INFO L226 Difference]: Without dead ends: 774 [2021-11-13 01:36:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1544 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 188.6s TimeCoverageRelationStatistics Valid=296073, Invalid=300683, Unknown=0, NotChecked=0, Total=596756 [2021-11-13 01:36:00,077 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.67ms SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 720.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:00,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 1180 Unknown, 0 Unchecked, 15.67ms Time], IncrementalHoareTripleChecker [398 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 720.98ms Time] [2021-11-13 01:36:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-13 01:36:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 773. [2021-11-13 01:36:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0025906735751295) internal successors, (774), 772 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 774 transitions. [2021-11-13 01:36:00,111 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 774 transitions. Word has length 387 [2021-11-13 01:36:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:00,112 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 774 transitions. [2021-11-13 01:36:00,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0052015604681404) internal successors, (773), 769 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 774 transitions. [2021-11-13 01:36:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-11-13 01:36:00,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:00,142 INFO L514 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1, 1] [2021-11-13 01:36:00,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:00,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:00,355 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1678265715, now seen corresponding path program 9 times [2021-11-13 01:36:00,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:00,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862117535] [2021-11-13 01:36:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:00,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:18,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:39:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862117535] [2021-11-13 01:39:18,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862117535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224331817] [2021-11-13 01:39:18,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:39:18,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:18,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:18,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6912b100-4184-410e-9c45-2aaf84b48899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 01:39:19,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:39:19,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-13 01:39:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:21,916 INFO L328 TraceCheckSpWp]: Computing backward predicates...