./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7 --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 b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:19:38,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:19:38,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:19:38,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:19:38,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:19:38,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:19:38,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:19:38,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:19:38,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:19:38,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:19:38,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:19:38,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:19:38,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:19:38,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:19:38,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:19:38,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:19:38,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:19:38,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:19:38,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:19:38,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:19:38,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:19:38,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:19:38,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:19:38,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:19:38,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:19:38,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:19:38,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:19:38,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:19:38,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:19:38,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:19:38,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:19:38,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:19:38,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:19:38,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:19:38,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:19:38,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:19:38,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:19:38,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:19:38,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:19:38,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:19:38,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:19:38,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:19:38,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:19:38,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:19:38,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:19:38,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:19:38,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:19:38,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:19:38,591 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:19:38,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:19:38,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:19:38,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:19:38,591 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:19:38,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:19:38,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:19:38,592 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:19:38,592 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:19:38,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:19:38,592 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:19:38,593 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:19:38,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:19:38,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:19:38,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:19:38,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:19:38,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:19:38,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:19:38,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:19:38,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:19:38,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:19:38,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:19:38,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:19:38,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:19:38,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:19:38,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:19:38,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:19:38,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:19:38,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:19:38,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:19:38,598 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_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2021-11-25 20:19:38,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:19:38,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:19:38,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:19:38,891 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:19:38,892 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:19:38,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-11-25 20:19:38,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/data/73a5f16af/30ffd75c23bd419ebf9fbaba0cb4fc1f/FLAG4e5cf25c4 [2021-11-25 20:19:39,503 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:19:39,503 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2021-11-25 20:19:39,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/data/73a5f16af/30ffd75c23bd419ebf9fbaba0cb4fc1f/FLAG4e5cf25c4 [2021-11-25 20:19:39,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/data/73a5f16af/30ffd75c23bd419ebf9fbaba0cb4fc1f [2021-11-25 20:19:39,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:19:39,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:19:39,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:19:39,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:19:39,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:19:39,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:19:39" (1/1) ... [2021-11-25 20:19:39,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588fc79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:39, skipping insertion in model container [2021-11-25 20:19:39,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:19:39" (1/1) ... [2021-11-25 20:19:39,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:19:39,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:19:40,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-11-25 20:19:40,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:19:40,173 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:19:40,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2021-11-25 20:19:40,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:19:40,254 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:19:40,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40 WrapperNode [2021-11-25 20:19:40,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:19:40,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:19:40,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:19:40,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:19:40,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,338 INFO L137 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2021-11-25 20:19:40,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:19:40,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:19:40,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:19:40,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:19:40,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:19:40,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:19:40,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:19:40,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:19:40,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (1/1) ... [2021-11-25 20:19:40,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:19:40,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:40,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:19:40,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:19:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:19:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:19:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:19:40,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:19:40,594 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:19:40,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:19:40,808 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:19:40,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:19:40,906 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:19:40,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:19:40 BoogieIcfgContainer [2021-11-25 20:19:40,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:19:40,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:19:40,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:19:40,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:19:40,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:19:39" (1/3) ... [2021-11-25 20:19:40,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9131ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:19:40, skipping insertion in model container [2021-11-25 20:19:40,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:40" (2/3) ... [2021-11-25 20:19:40,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9131ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:19:40, skipping insertion in model container [2021-11-25 20:19:40,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:19:40" (3/3) ... [2021-11-25 20:19:40,921 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2021-11-25 20:19:40,931 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:19:40,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:19:41,007 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:19:41,017 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 [2021-11-25 20:19:41,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:19:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:19:41,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:41,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:19:41,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 105098037, now seen corresponding path program 1 times [2021-11-25 20:19:41,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:41,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429796650] [2021-11-25 20:19:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:41,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:41,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:41,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429796650] [2021-11-25 20:19:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429796650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:41,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:41,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:19:41,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170392568] [2021-11-25 20:19:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:41,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:41,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:41,302 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-11-25 20:19:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:41,344 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2021-11-25 20:19:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 [2021-11-25 20:19:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:41,352 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:19:41,353 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 20:19:41,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:41,360 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:41,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:19:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 20:19:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-25 20:19:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-25 20:19:41,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-11-25 20:19:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-25 20:19:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-11-25 20:19:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-25 20:19:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:19:41,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:41,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:41,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:19:41,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 92344700, now seen corresponding path program 1 times [2021-11-25 20:19:41,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:41,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275284457] [2021-11-25 20:19:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:41,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:41,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275284457] [2021-11-25 20:19:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275284457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067383334] [2021-11-25 20:19:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:41,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:41,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:41,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:19:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:19:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:41,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:41,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067383334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323078898] [2021-11-25 20:19:41,853 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:19:41,854 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:19:41,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:19:41,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:19:41,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:19:41,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:41,976 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:19:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:19:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:19:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,068 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 20:19:42,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 20:19:42,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,121 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:19:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:19:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:42,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 20:19:42,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:42,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:42,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:42,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:42,637 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 20:19:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 20:19:42,709 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 20:19:42,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 20:19:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:19:43,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 258 [2021-11-25 20:19:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,219 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 286 [2021-11-25 20:19:43,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,289 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 20:19:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 263 [2021-11-25 20:19:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,392 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:43,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 276 [2021-11-25 20:19:43,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,464 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:43,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,533 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:43,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 20:19:43,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:44,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:44,026 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:19:44,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1323078898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:44,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:19:44,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2021-11-25 20:19:44,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217584427] [2021-11-25 20:19:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:44,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:44,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:44,318 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:44,408 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-25 20:19:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:19:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:19:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:44,411 INFO L225 Difference]: With dead ends: 21 [2021-11-25 20:19:44,412 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:19:44,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:44,419 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:44,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:19:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-25 20:19:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 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) [2021-11-25 20:19:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 20:19:44,431 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2021-11-25 20:19:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:44,432 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 20:19:44,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 20:19:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:19:44,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:44,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:44,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:44,659 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash 805788942, now seen corresponding path program 1 times [2021-11-25 20:19:44,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177224471] [2021-11-25 20:19:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:44,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:19:44,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177224471] [2021-11-25 20:19:44,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177224471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:44,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517318483] [2021-11-25 20:19:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:44,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:44,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:19:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:19:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:19:44,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:19:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517318483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330286223] [2021-11-25 20:19:44,959 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:19:44,959 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:19:44,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:19:44,960 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:19:44,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:19:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:44,999 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:19:45,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:19:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:19:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,074 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:19:45,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:19:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:19:45,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:45,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 20:19:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:45,431 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 20:19:45,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 20:19:45,494 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 20:19:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 20:19:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:45,901 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 286 [2021-11-25 20:19:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,048 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:46,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 280 [2021-11-25 20:19:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:19:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 246 [2021-11-25 20:19:46,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,143 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 20:19:46,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 257 [2021-11-25 20:19:46,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,194 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:46,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:46,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,267 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:46,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 20:19:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:46,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:46,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:46,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 49 [2021-11-25 20:19:46,684 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 20:19:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 20:19:46,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:19:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:19:46,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:47,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:47,114 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:19:48,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:19:48,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:19:48,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:19:48,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-25 20:19:48,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379920033] [2021-11-25 20:19:48,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:19:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:48,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:48,028 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:48,064 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-25 20:19:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:19:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:19:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:48,065 INFO L225 Difference]: With dead ends: 26 [2021-11-25 20:19:48,065 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:19:48,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:48,067 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:48,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:19:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:19:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 20:19:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 20:19:48,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-11-25 20:19:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 20:19:48,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 20:19:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:19:48,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:48,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:48,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:48,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1235104985, now seen corresponding path program 2 times [2021-11-25 20:19:48,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941974476] [2021-11-25 20:19:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:48,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:19:48,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941974476] [2021-11-25 20:19:48,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941974476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458239329] [2021-11-25 20:19:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:19:48,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:48,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:48,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:48,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:19:48,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:19:48,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:19:48,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:19:48,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:19:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458239329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346531455] [2021-11-25 20:19:48,598 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:19:48,598 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:19:48,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:19:48,599 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:19:48,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:19:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,640 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:19:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:19:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:19:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,723 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:19:48,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:19:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:19:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:48,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:48,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 20:19:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:19:48,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:19:49,022 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 20:19:49,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 20:19:49,087 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 20:19:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 20:19:49,411 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:19:49,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 268 [2021-11-25 20:19:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:49,544 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 20:19:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:49,643 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:19:49,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 276 [2021-11-25 20:19:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:49,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:49,725 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-25 20:19:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 293 treesize of output 283 [2021-11-25 20:19:49,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:49,789 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:49,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:49,847 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:19:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:19:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:50,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:50,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:50,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:50,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:50,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:19:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 20:19:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:50,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:50,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 49 [2021-11-25 20:19:50,562 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 20:19:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 20:19:50,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:50,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:19:50,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:50,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:19:50,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:50,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:19:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:50,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:19:50,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:19:50,987 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:19:51,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '380#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:19:51,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:19:51,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:19:51,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-25 20:19:51,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506794878] [2021-11-25 20:19:51,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:19:51,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:19:51,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:19:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:19:51,831 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:51,875 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-25 20:19:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:19:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 20:19:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:51,876 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:19:51,877 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:19:51,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:19:51,878 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:51,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:19:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:19:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 20:19:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-25 20:19:51,885 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 12 [2021-11-25 20:19:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:51,885 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-25 20:19:51,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-25 20:19:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:19:51,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:51,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:19:51,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:52,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:52,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1483882621, now seen corresponding path program 3 times [2021-11-25 20:19:52,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:52,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897015088] [2021-11-25 20:19:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:52,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:19:52,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897015088] [2021-11-25 20:19:52,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897015088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:52,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:52,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:19:52,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736423830] [2021-11-25 20:19:52,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:52,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:52,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:19:52,175 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:52,267 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-25 20:19:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:19:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:19:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:52,269 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:19:52,269 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:19:52,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:52,270 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:52,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:19:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 20:19:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 20:19:52,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2021-11-25 20:19:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:52,277 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 20:19:52,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 20:19:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:19:52,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:52,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:19:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:19:52,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1126605433, now seen corresponding path program 1 times [2021-11-25 20:19:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266590462] [2021-11-25 20:19:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:52,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:19:52,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:52,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266590462] [2021-11-25 20:19:52,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266590462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082927162] [2021-11-25 20:19:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:52,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:52,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:52,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:19:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:19:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:52,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2021-11-25 20:19:52,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-11-25 20:19:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:19:52,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:52,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082927162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:52,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:52,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-25 20:19:52,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826045008] [2021-11-25 20:19:52,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:52,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:52,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:19:52,743 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-25 20:19:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:52,778 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-25 20:19:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:19:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 21 [2021-11-25 20:19:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:52,780 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:19:52,780 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 20:19:52,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:19:52,781 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:52,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 20:19:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 20:19:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-25 20:19:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 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) [2021-11-25 20:19:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-25 20:19:52,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2021-11-25 20:19:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:52,789 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-25 20:19:52,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-25 20:19:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-25 20:19:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:19:52,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:52,790 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:19:52,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:52,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:52,999 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash -452641475, now seen corresponding path program 1 times [2021-11-25 20:19:53,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:53,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001796710] [2021-11-25 20:19:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:53,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:19:53,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:53,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001796710] [2021-11-25 20:19:53,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001796710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173028797] [2021-11-25 20:19:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:53,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:53,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:53,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:19:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 20:19:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:53,729 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 20:19:53,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2021-11-25 20:19:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:53,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2021-11-25 20:19:53,925 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 20:19:53,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-11-25 20:19:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2021-11-25 20:19:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:19:53,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:54,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 137 [2021-11-25 20:19:54,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 280 [2021-11-25 20:20:01,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-11-25 20:20:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:20:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173028797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:01,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086983645] [2021-11-25 20:20:01,225 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:20:01,225 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:01,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:01,226 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:01,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,258 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:20:01,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:20:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,288 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:01,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:20:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,341 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 20:20:01,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 20:20:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,384 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:20:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:20:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:20:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 20:20:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:20:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:20:01,690 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 20:20:01,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 20:20:01,747 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 20:20:01,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 20:20:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,102 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:20:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 286 [2021-11-25 20:20:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,217 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 20:20:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 280 [2021-11-25 20:20:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:20:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 246 [2021-11-25 20:20:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,303 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 20:20:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 257 [2021-11-25 20:20:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,353 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:20:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:20:02,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,408 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 20:20:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 20:20:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 20:20:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:20:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:02,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:02,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 20:20:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 20:20:02,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:02,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:02,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:02,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 20:20:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:03,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 20:20:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:03,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:03,223 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:04,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '897#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:04,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:04,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:04,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-11-25 20:20:04,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100715625] [2021-11-25 20:20:04,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:04,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 20:20:04,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 20:20:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 20:20:04,568 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 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) [2021-11-25 20:20:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:05,541 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-25 20:20:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:20:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 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 25 [2021-11-25 20:20:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:05,543 INFO L225 Difference]: With dead ends: 45 [2021-11-25 20:20:05,543 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 20:20:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 20:20:05,546 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 123 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 38 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 171 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2021-11-25 20:20:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 20:20:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-25 20:20:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-25 20:20:05,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2021-11-25 20:20:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:05,555 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-25 20:20:05,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 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) [2021-11-25 20:20:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-25 20:20:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:20:05,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:05,556 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:20:05,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 20:20:05,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:20:05,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -839898856, now seen corresponding path program 2 times [2021-11-25 20:20:05,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:05,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430150474] [2021-11-25 20:20:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:05,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:20:06,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430150474] [2021-11-25 20:20:06,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430150474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270138773] [2021-11-25 20:20:06,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:20:06,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:06,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:06,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:06,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda10d1a-a60a-4d92-9724-59f17e8ae479/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:20:06,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:20:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-25 20:20:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:06,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:06,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:06,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:20:06,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:20:06,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 20:20:06,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 20:20:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 20:20:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 20:20:06,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 20:20:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:20:07,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:07,855 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_17 Int) (v_ArrVal_604 (Array Int Int)) (v_ArrVal_609 (Array Int Int))) (let ((.cse9 (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4))) (let ((.cse3 (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_604))) (store .cse10 v_DerPreprocessor_17 (store (select .cse10 v_DerPreprocessor_17) .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_609)) (.cse6 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse4 (store (select .cse8 .cse6) .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (store .cse8 .cse6 .cse4))) (let ((.cse7 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse5 (+ .cse7 4))) (let ((.cse1 (select (select .cse3 .cse6) .cse5)) (.cse2 (+ (select .cse4 .cse5) 4))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0)))) (not (= .cse6 |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| .cse7)) (not (= v_DerPreprocessor_17 .cse6)))))))))) is different from false [2021-11-25 20:20:08,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:08,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1098 treesize of output 688 [2021-11-25 20:20:12,946 INFO L354 Elim1Store]: treesize reduction 4440, result has 24.2 percent of original size [2021-11-25 20:20:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 33 new quantified variables, introduced 210 case distinctions, treesize of input 97234 treesize of output 85713 [2021-11-25 20:20:13,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:13,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88289 treesize of output 58619 [2021-11-25 20:21:30,853 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 3381 DAG size of output: 1087 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:21:30,866 INFO L354 Elim1Store]: treesize reduction 8645, result has 26.7 percent of original size [2021-11-25 20:21:30,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 41 select indices, 41 select index equivalence classes, 0 disjoint index pairs (out of 820 index pairs), introduced 62 new quantified variables, introduced 820 case distinctions, treesize of input 975933 treesize of output 853290 [2021-11-25 20:22:02,212 WARN L227 SmtUtils]: Spent 31.31s on a formula simplification. DAG size of input: 11626 DAG size of output: 11591 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:22:16,710 WARN L227 SmtUtils]: Spent 14.28s on a formula simplification that was a NOOP. DAG size: 11423 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:22:18,383 INFO L244 Elim1Store]: Index analysis took 225 ms [2021-11-25 20:22:50,909 WARN L227 SmtUtils]: Spent 32.43s on a formula simplification. DAG size of input: 751 DAG size of output: 475 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:22:50,911 INFO L354 Elim1Store]: treesize reduction 1519, result has 53.6 percent of original size [2021-11-25 20:22:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 27 new quantified variables, introduced 171 case distinctions, treesize of input 1285758 treesize of output 1137815 [2021-11-25 20:24:02,773 WARN L227 SmtUtils]: Spent 1.20m on a formula simplification. DAG size of input: 12847 DAG size of output: 12836 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:24:24,659 WARN L227 SmtUtils]: Spent 21.75s on a formula simplification that was a NOOP. DAG size: 12807 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:24:33,220 INFO L244 Elim1Store]: Index analysis took 5604 ms [2021-11-25 20:25:45,491 WARN L227 SmtUtils]: Spent 1.20m on a formula simplification. DAG size of input: 1087 DAG size of output: 629 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:25:45,493 INFO L354 Elim1Store]: treesize reduction 2956, result has 47.1 percent of original size [2021-11-25 20:25:45,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 1205531 treesize of output 1091994 [2021-11-25 20:26:57,078 WARN L227 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 13803 DAG size of output: 13785 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:27:56,780 WARN L227 SmtUtils]: Spent 59.63s on a formula simplification. DAG size of input: 13701 DAG size of output: 13695 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:28:37,753 WARN L227 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 6654 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 20:32:02,444 WARN L234 Elim1Store]: Array PQE input equivalent to true